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NCERT Exemplar Class 9 Science Solutions Chapter 1 Matter in Our Surroundings

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NCERT Exemplar Class 9 Science Solutions Chapter 1 Matter in Our Surroundings

Edited By Sumit Saini | Updated on Sep 01, 2022 12:32 PM IST

NCERT exemplar Class 9 Science solutions chapter 1 provides an understanding of science, studying natural phenomena occurring around us. It gives the power to speculate and compare the observations. This chapter provides the basic knowledge of matter which is everything we can see or touch around us. The NCERT Class 9 Science is easily understandable using these NCERT exemplar Class 9 Science chapter 1 solutions prepared by our highly skilled science division. These NCERT exemplar Class 9 Science chapter 1 solutions help build a strong base for the concepts of Matter in Our Surroundings. The NCERT exemplar Class 9 Science solutions chapter 1 are corresponding to the CBSE syllabus for Class 9.

NCERT Exemplar Class 9 Science Solutions Chapter 1-MCQ

Question:1

Which one of the following sets of phenomena would increase on raising the temperature?
(a) Diffusion, evaporation, compression of gases
(b) Evaporation, compression of gases, solubility
(c) Evaporation, diffusion, expansion of gases
(d) Evaporation, solubility, diffusion, compression of gases

Answer:c

Temperature is the measurement of kinetic energy of particles or molecules for any substance, so on increasing temperature their kinetic energy increases.
The process of diffusion means intermixing of molecules of two different gases, which will definitely increase on increasing temperature.
In process of evaporation liquid molecules get converted into its vapor, for which they need energy which can be supplied by increasing temperature.
Generally solubility also increases by increasing temperature.
Thermal expansion is a general phenomenon which is observed in all the matters including gases liquids or solids and they will increase their volume on increasing temperature.
Hence the correct answer is option C

Question:2

Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions:
(a) Low temperature, low pressure
(b) High temperature, low pressure
(c) Low temperature, high pressure
(d) High temperature, high pressure

Answer: C

Ideally a gas does not have interaction between molecules by any kind of force. In real gases these forces are present and can be decreased by decreasing pressure and increasing temperature. Therefore any natural gas will behave as an ideal gas, if its temperature is increased and pressure is decrease.
On the other hand if we decrease the temperature and increase the pressure the interactions between gas molecules will increase and it will tends to liquefy.
Hence the correct answer is C.

Question:3

The property to flow is unique to fluids. Which one of the following statements is correct?
(a) Only gases behave like fluids
(b) Gases and solids behave like fluids
(c) Gases and liquids behave like fluids
(d) Only liquids are fluids

Answer:C

The intermolecular force among the molecules of a solid is very strong so molecules cannot change its position on increasing temperature. These molecules of solid can vibrate at their own place but cannot leave their place hence they have rigidity.
On the other hand, the intermolecular force among the molecules of liquid and gases are small, so these liquids and gases can acquire the shape of the vessel and can flow easily.
Hence the correct answer of this question is option C.

Question:4

During summer, water kept in an earthen pot becomes cool because of the phenomenon of
(a) diffusion
(b) transpiration
(c) osmosis
(d) evaporation

Answer: D

The old Indian method to cool down the water is, Storing water in earthen pots.
These pots have pores in it by which evaporation of water take place.
In this Phenomenon, some water molecules get energy from the remaining water molecules in the pot and evaporate. Escape of high energy molecules from water leads to loss of heat from remaining water. As the remaining water loses heat, its temperature decreases.
Transpiration is the phenomenon of water movement and evaporation in the plants.
In case of diffusion, the molecules of matter moves from higher concentration to lower concentration.
In osmosis, the solvent tends to move through a semi permeable membrane from low concentration to high concentration.
Hence the correct option is D.

Question:5

A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the following represents a correct arrangement?
(a) Water, air, wind
(b) Air, sugar, oil
(c) Oxygen, water, sugar
(d) Salt, juice, air

Answer:C

The intermolecular forces and its strength defines the state of matter.
Strong molecular forces leads the substance to be a solid, moderate molecular forces makes it liquid and the weakest or no intermolecular forces makes it gas.
Hence we can say the intermolecular forces increases, if the state of matter changes from gases to liquid to solid.
Air, oxygen and wind are gases.
Water, oil and juice are liquids.
Sugar and salt are solids.
Hence the correct answer is C

Question:6

On converting 25°C, 38°C and 66°C to kelvin scale, the correct sequence of temperature will be
(a) 298 K, 311 K and 339 K
(b) 298 K, 300 K and 338 K
(c) 273 K, 278 K and 543 K
(d) 298 K, 310 K and 338 K

Answer: A

Celsius scale of temperature is based on water and its state. The melting point is taken as zero reference and boiling point of water is taken as 100.
Kelvin scale of temperature is known as absolute temperature scale.
These two scales can be easily related by a linear relation.
If temperature in Celsius scale is X then the same temperature in Kelvin scale will be X +273.
We have 25°C, 38°C and 66°C.
On conversion, these temperatures will be 298K, 311K and 339K respectively.
Hence the correct answer will be option A

Question:7

Choose the correct statement of the following
(a) conversion of solid into vapours without passing through the liquid state is called sublimation.
(b) conversion of vapours into solid without passing through the liquid state is called vapourisation.
(c) conversion of vapours into solid without passing through the liquid state is called freezing.
(d) conversion of solid into liquid is called sublimation.

Answer:A

When the temperature of the gas decreases, at a particular temperature the gas get liquefy, this phenomenon is called condensation. If we further decrease the temperature of liquid, the liquid get converted into solid, this phenomenon is called freezing.
On the other hand if we increase the temperature of a solid, at a particular temperature it get liquefy, this phenomena is called melting. If we further increase the temperature of the liquid, it get converted into vapor, this phenomenon is called boiling.
But some solids shows exceptional behavior on increasing their temperature, they can directly convert into gases without acquiring intermediate liquid state. This phenomenon is called sublimation.
Hence the correct answer is option A.

Question:8

The boiling points of diethyl ether, acetone and n-butyl alcohol are 35°C, 56°C and 118°C respectively. Which one of the following correctly represents their boiling points in kelvin scale?
(a) 306 K, 329 K, 391 K
(b) 308 K, 329 K, 392 K
(c) 308 K, 329 K, 391 K
(d) 329 K, 392 K, 308 K

Answer:C

Celsius scale of temperature is based on water and its state. The melting point is taken as zero reference and boiling point of water is taken as 100.
Kelvin scale of temperature is known as absolute temperature scale.
These two scales can be easily related by a linear relation.
If temperature in Celsius scale is X then the same temperature in Kelvin scale will be X +273.
The boiling points of diethyl ether, acetone and n-butyl alcohol are given as 35°C, 56°C and 118°C respectively
On conversion, their temperatures will be 308K, 329K and 391K.
Hence the correct answer will be option A

Question:9

Which condition out of the following will increase the evaporation of water?
(a) Increase in temperature of water
(b) Decrease in temperature of water
(c) Less exposed surface area of water
(d) Adding common salt to water

Answer:A

In case of evaporation, some liquid molecules take energy from rest of the liquid molecules and get converted in vapour.
If we increase the temperature of any liquid, it would be easy for some molecules to take the energy from rest of the molecules. As at higher temperature, all of them have higher amount of energy which will help process of evaporation.
The process of evaporation will be supported by exposure of surface to the surrounding, hence higher surface area leads to higher evaporation.
When we add common salt in water, some part of this salt covers the surface area along with water molecules which will create obstacles in evaporation.
Hence the correct answer of this question is option A.

Question:10

In which of the following conditions, the distance between the molecules of hydrogen gas would increase?
(i) Increasing pressure on hydrogen contained in a closed container
(ii) Some hydrogen gas leaking out of the container
(iii) Increasing the volume of the container of hydrogen gas
(iv) Adding more hydrogen gas to the container without increasing the volume of the container
(a) (i) and (iii)
(b) (i) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)

Answer: C

Molecules of gas acquire the complete volume of container.
These molecules move randomly inside the container, therefore the average molecular separation can be calculated by assuming the given number of molecules in given volume.
It is easy to understand, that the average molecular separation will increase by either increasing the volume keeping number of molecules constant or by decreasing number of molecules keeping volume constant.
Increasing pressure will lead to increase in temperature of a gas in closed container. This will increase the kinetic energy of molecules. Therefore, it will not help in increasing distance between molecules.
Hence statement numbers (i) and (iii) are correct which will lead to correct answer as option C.

NCERT Exemplar Class 9 Science Solutions Chapter 1-Short Answer

Question:11

A sample of water under study was found to boil at 102°C at normal temperature and pressure. Is the water pure? Will this water freeze at 0°C? Comment.

Answer:

At one atmospheric pressure condition, pure water start boiling at 100°C and it freezes at 0°C.
If we add some impurity in pure water, it leads to elevation in boiling point and depression in freezing point.
That means, water will boil at temperature more than hundred degrees centigrade And freeze at temperature lower than 0°C.
Hence we can say the given water is not pure and it will freeze at some temperature less than 0°C.

Question:12

A student heats a beaker containing ice and water. He measures the temperature of the content of the beaker as a function of time. Which of the following (Fig. 1.1) would correctly represent the result? Justify your choice.

Answer:

Ice and water can coexist at 0°C which is melting point of ice. As stated in the question, initially the container has ice as well as water, therefore the initial temperature has to be 0°C.
When we start giving heat to this mixture, the temperature will remain constant, because ice will melt by using the given heat.
When the complete ice will melt and container will have only water at 0°C, The heat given will lead to increase in temperature.
If we assume that heat given has a constant rate, then after that temperature increases linearly.
Hence the correct answer is option D

Question:13

Fill in the blanks:
(a) Evaporation of a liquid at room temperature leads to a _______ effect.
(b) At room temperature the forces of attraction between the particles of solid substances are _______ than those which exist in the gaseous state.
(c) The arrangement of particles is less ordered in the_______ state. However, there is no order in the _______state.
(d)_______ is the change of solid state directly to vapour state without going through the _______ state.
(e) The phenomenon of change of a liquid into the gaseous state at any temperature below its boiling point is called _______.

Answer:

a) Cooling
b) Stronger
c) Liquid, Gaseous
d) Sublimation , Liquid
e) Evaporation
a) In process of evaporation, some molecules of liquid take energy from rest of the molecules and get converted in vapour. Therefore, the energy of remaining liquid decreases which leads to decrease in temperature.
Hence we have to fill the blank space by COOLING
b) The intermolecular force among the molecules of solids is maximum among all three states.
Force in solids are more than intermolecular force among the molecules of liquid.
On the same line intermolecular forces among the molecules of liquid is more than force between gas molecules.
Hence we have to fill the blank space by STRONGER.
c) In solids, particles are arranged in perfect order. In liquid, molecules are less ordered and in gases they are totally random.
Hence at the first place we have to fill LIQUID and in second space we have to fill the GASEOUS.
d) In the process of sublimation, solids change to gaseous state without going through the liquid state.
Hence first place is filled with sublimation and the second space is filled with liquid.
e) At every temperature of liquid, some molecules of liquid gets converted into vapour.
This process is called evaporation.
Hence we have to fill the space with evaporation.

Question:14

Match the physical quantities given in column A to their S I units given in column B

(A)
(B)
(a) Pressure
(b) Temperature
(c) Density
(d) Mass
(e) Volume
(i) cubic meter
(ii) kilogram
(iii) pascal
(iv) kelvin
(v) kilogram per cubic meter

Answer:

(a—iii) (b—iv) (c—v) (d—ii) (e—i)
Pressure is defined as normal force per unit area. Hence, its unit is newton per metre square. This is also known as Pascal.
The unit of temperature in SI unit system is Kelvin.
Density is defined as ratio of mass and volume, hence its SI unit is kilogram per cubic meter.
The SI unit of mass is kilogram.
Volume is the measurement of three-dimensional space covered by any object hence its unit is cubic meter.

Question:15

The non SI and SI units of some physical quantities are given in column A and column B respectively. Match the units belonging to the same physical quantity:
(A) (B)
(a) degree celsius (i) kilogram
(b) centimetre (ii) pascal
(c) gram per centimetre cube (iii) metre
(d) bar (iv) kelvin
(e) milligram (v) kilogram per metre cube

Answer:

(a—iv) (b—iii) (c—v) (d—ii) (e—i)
Temperature can be measured in degrees Celsius or Kelvin or Fahrenheit.
Length is measured, in meter as per SI unit system and in centimetre as per CGS unit system.
Gram per centimetre cube and kilogram per metre cube, both are units of density in CGS system and SI system respectively.
Bar and Pascal are units to measure the pressure.
Milligram and kilogram are the units of mass.

Question:16

‘Osmosis is a special kind of diffusion’. Comment.

Answer:

In diffusion of liquid or gases, the particles move from higher concentration to low concentration.
In the process of osmosis, solvent goes through a semipermeable membrane from low concentration to high concentration.
In both cases, the particles wants to equate the concentrations. Therefore, we can say osmosis is a special kind of diffusion.

Question:17

Classify the following into osmosis/diffusion
(a) Swelling up of a raisin on keeping in water.
(b) Spreading of virus on sneezing.
(c) Earthworm dying on coming in contact with common salt.
(d) Shrinking of grapes kept in thick sugar syrup.
(e) Preserving pickles in salt.
(f) Spreading of smell of cake being baked through out the house.
(g) Aquatic animals using oxygen dissolved in water during respiration.

Answer:

(a)(c)(d)(e) – Osmosis (b)(f)(g) - Diffusion

A) When a raisin is kept in water, the water concentration will be smaller in raisins. Therefore, through the semipermeable membrane of raisin, water goes into the raisin. This is defined as Osmosis.
Due to excess of water the phenomenon of swelling occurs.
B) The concentration of virus in the air which comes out from the mouth during sneezing is very high.
These viruses get diffused in the ambient because of difference in concentration.
C) In salty water, due to osmosis, water from body of earthworm comes out. This leads to bursting of cells in body of earthworm and it dies.
D) When grapes are kept in thick sugar syrup, the water concentration will be less in sugar syrup. Due to osmosis, water from grapes comes out to the sugar syrup and the grapes shrink in this process.
E) Due to salt water from fruits or vegetables comes out by process of osmosis. This prevents oxidation of fruits and vegetables. Therefore, these pickles can be preserved for long.
F) When we bake a cake, the smell contained particles diffuse in ambient atmosphere. This occurs due to diffusion: particles move from high to low concentration.
G) Aquatic animals use oxygen, dissolved in water during respiration. This water has higher concentration of oxygen than blood. This difference in concentration causes diffusion of oxygen in to the blood.

Question:18

Water as ice has a cooling effect, whereas water as steam may cause severe burns. Explain these observations.

Answer:

When heat is released from our body, this effect cools down the body.
When heat is absorbed by our body, this effect heats up the body and burn it.
When water comes in contact as ice, it has low energy so heat from body goes to ice and causes cooling effect.
When steam come in contact with body, it gives heat to the body which causes burn. Steam at 1000C has more energy than water at 1000C.

Question:19

Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. Comment.

Answer:

In the process of boiling, water converts into steam by absorbing heat but without changing temperature. This heat is called latent heat of evaporation and it is possessed by vapour molecules.
Hence even water in boiling state and steam have same temperature, the energy of vapour molecules is more than water.
This is the reason, why Steam causes more burning than boiling water even they have same temperature.

Question:20

A glass tumbler containing hot water is kept in the freezer compartment of a refrigerator (temperature < 0°C). If you could measure the temperature of the content of the tumbler, which of the following graphs (Fig.1.2) would correctly represent the change in its temperature as a function of time.


Answer:

When hot water tumbler is kept in freezer, the temperature of water decreases as it loses energy to the freezer. The decrease in temperature of water goes up to 0°C. The water still loses energy to refrigerator as its temperature is less than 0°C, but this loss of energy will change the phase of water and it get converted in ice.
Till the time all water get converted in ice, temperature remained constant at 0°C.
After complete formation of ice, the ice will cool down to lower temperature until it equates with temperature of refrigerator.
Hence, the correct graph of temperature is given in option A.

Question:21

Look at Fig. 1.3 and suggest in which of the vessels A, B, C or D the rate of evaporation will be the highest? Explain.

Answer:

The process of evaporation will be more if surface area of water is more.
In the process of evaporation, some water molecules gets converted in vapour and remain above the liquid surface. With the help of high-speed air, these molecules of vapour can be taken away. This removal of vapour molecules, causes other water molecules to come out in form of vapour.
Hence we can say open container will show more evaporation in presence of high speed air.
Therefore, In case C, rate of evaporation will be maximum.

Question:22

(a) Conversion of solid to vapour is called sublimation. Name the term used to denote the conversion of vapour to solid.
(b) Conversion of solid state to liquid state is called fusion; what is meant by latent heat of fusion?

Answer:

A) The opposite of sublimation is generally known as de-sublimation. It is also known as deposition. In this Phenomenon, vapour get converted into solid directly without having liquid state.
B) At melting point of a solid, if we supply heat then it is used in changing solid state to liquid state without changing temperature.
This phenomenon is called fusion and this given heat is called latent heat of fusion.
Water at 0°C has more energy than ice at 0°C because of this latent heat of fusion.

NCERT Exemplar Class 9 Science Solutions Chapter 1-Long-Answer

Question:23

You are provided with a mixture of naphthalene and ammonium chloride by your teacher. Suggest an activity to separate them with well labelled diagram.

Answer:

Only polar compounds dissolve in water.
When nonpolar compound is mixed with water it gets precipitated.
We are given a mixture of naphthalene and Ammonium chloride.
We know that naphthalene is a non-polar compound and ammonium chloride is a polar compound.
If you make water solution of the mixture of naphthalene and ammonium chloride, the naphthalene with precipitate and ammonium chloride will dissolve.
So by the process of decantation, using funnel and filter paper, we can separate naphthalene.
Ammonium chloride is volatile at higher temperature. Hence, by the process of evaporation we can find out dry ammonium chloride from aqua solution.

Question:24

It is a hot summer day, Priyanshi and Ali are wearing cotton and nylon clothes respectively. Who do you think would be more comfortable and why?

Answer:

In season of summers the body tries to cool down itself by sweating. In this process, body excrete water from the skin and this water get evaporated and cools down the body.
In case of evaporation, some liquid molecules take energy from rest of the liquid molecules and get converted in vapour.
Cotton clothes absorb the water, and water gets evaporated through their surface. This will help to cool down the body temperature.
Nylon clothes does not absorb water, and create obstacles in process of evaporation.
Hence in season of summers it is advised to wear cotton clothes which will be more comfortable.

Question:25

You want to wear your favorite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?

Answer:

The wet clothes loses water by the process of evaporation.
The process of evaporation, depends on surface area and temperature as well as high-speed of air.
By increasing any of the above we can increase the rate of evaporation.
If we have to speed up the process of evaporation for quick drying of clothes we can use following steps.
We can dry our clothes in front of high speed fan, which will help the process of evaporation.
We can increase the surface area, by opening it completely at the time of drying.
We can definitely increase the evaporation by exposure of sunlight if it is available.
We can use hot iron to press the clothes as heat increases the rate of evaporation.

Question:26

Comment on the following statements:
(a) Evaporation produces cooling.
(b) Rate of evaporation of an aqueous solution decreases with increase in humidity.
(c) Sponge though compressible is a solid.

Answer:

a) In the process of evaporation, some molecules of liquid takes energy from other liquid molecules. By absorbing this energy, these molecules got converted in vapour.
By this process, the remaining liquid molecules will have lesser amount of energy. This decrement in energy causes cooling of liquid.
b) In the process of evaporation, liquids get converted in vapour. This Phenomenon stops after sometime due to high concentration of vapour above water surface.
At this time, sufficient number of vapour molecules are present above the liquid surface.
In humid atmosphere, water vapour molecules have high concentration. This high concentration of vapour, opposes the process of evaporation. Hence, it is difficult to evaporate in humid ambient.
c) Sponge is undoubtedly a solid as it has definite shape and volume unlike gases and liquids.
But sponge have some pores in it, where air is trapped.
When we tried to squeeze the sponge, the trapped air leaks out.
Then the space of air is occupied by the sponge, which causes it to shrink.
Therefore, it is compressible even if it is solid.

Question:27

Why does the temperature of a substance remain constant during its melting point or boiling point?

Answer:

The energy possessed by gases is more than liquids and similarly liquid possess more energy than solids.
When we heat up any solid at its melting temperature it keeps on receiving heat but its temperature does not change. The given heat is used to change the state of solid to liquid and this heat is called latent heat of fusion.
Similarly, when we heat liquid at its boiling point the temperature of liquid does not change. The given heat is used to change the state of liquid to gas and this heat is called latent heat of evaporation.
Generally heating results as rise in temperature but at boiling point and at melting point this is not observed. The heat given is used in state change.

NCERT Exemplar Solutions Class 9 Science Chapter 1 Important Topics:

NCERT exemplar Class 9 Science solutions chapter 1 on Matter in Our Surroundings deals with the specified topics:

  • The basic definition of Matter in Our Surroundings.
  • Classification of Matter in Liquids, Solids, and Gases.
  • Effect of changing temperature and pressure on states of matter.
  • NCERT exemplar Class 9 Science solutions chapter 1 explains the processes like evaporation and boiling freezing sublimation, et cetera.
  • In this chapter, Degrees, Celsius, and Kelvin scale are discussed as to how they relate to each other.

NCERT Class 9 exemplar solutions for Other Subjects:

NCERT Class 9 Science Exemplar Solutions for Other Chapters:

Features of NCERT Exemplar Class 9 Science Solutions Chapter 1:

These Class 9 Science NCERT exemplar chapter 1 solutions provide a basic understanding of matter and its classifications. The matter is classified into three types: Liquid, Solid, and Gas. The effects of changing temperature and pressure on the matter as also discussed in this chapter. Class 9 students can refer to these solutions to understand the concepts and problems based on Matter in our Surroundings. The NCERT exemplar Class 9 Science solutions chapter 1 equips the students to practice and study from books such as NCERT Class 9 Science textbook, Lakhmir Singh and Manjit Kaur by S. Chand et cetera.

One of the unique features of these solutions is NCERT exemplar Class 9 Science solutions chapter 1 pdf download which enables the students to clarify their doubts and provide a flawless learning experience while studying NCERT exemplar Class 9 Science chapter 1.

Check the Solutions of Questions Given in the Book

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Frequently Asked Question (FAQs)

1. Q1. At what temperature, evaporation of water will take place?

A1. Evaporation of any liquid takes place at every temperature. Therefore, evaporation of water will take place at every temperature. 

2. Q2. Why does water not evaporate if kept in an open pan?

A2. Water kept in an open pan continuously evaporates, but at the same time, condensation of vapour also takes place. In some time, a kind of dynamic equilibrium is established between evaporation and condensation. The amount of water and amount of vapour above the water surface becomes constant in this equilibrium state.

3. Q3. What will happen if we put water in an open pan at the surface of the moon?

A3. There is no atmosphere on the moon; hence, the vapour formed by evaporation goes away and could not condense back to water. The process of evaporation will continue till the water in the pan exists. Some of the water will evaporate in some time, and the rest of the water will be in the form of ice. We can say that water in liquid form cannot exist on the moon.

4. Q4. What are the mark distributions and question types one should expect in the examination?

A4. Generally, this chapter contributes to around 4-5 marks of the whole paper with questions distributed across objective or short answer types. A thorough study of NCERT Exemplar Class 9 Science solutions chapter 1 will help the students score well in the chapter of Matter in Our Surroundings.

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Get answers from students and experts

A block of mass 0.50 kg is moving with a speed of 2.00 ms-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

Option 1)

0.34\; J

Option 2)

0.16\; J

Option 3)

1.00\; J

Option 4)

0.67\; J

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times.  Assume that the potential energy lost each time he lowers the mass is dissipated.  How much fat will he use up considering the work done only when the weight is lifted up ?  Fat supplies 3.8×107 J of energy per kg which is converted to mechanical energy with a 20% efficiency rate.  Take g = 9.8 ms−2 :

Option 1)

2.45×10−3 kg

Option 2)

 6.45×10−3 kg

Option 3)

 9.89×10−3 kg

Option 4)

12.89×10−3 kg

 

An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

Option 1)

2,000 \; J - 5,000\; J

Option 2)

200 \, \, J - 500 \, \, J

Option 3)

2\times 10^{5}J-3\times 10^{5}J

Option 4)

20,000 \, \, J - 50,000 \, \, J

A particle is projected at 600   to the horizontal with a kinetic energy K. The kinetic energy at the highest point

Option 1)

K/2\,

Option 2)

\; K\;

Option 3)

zero\;

Option 4)

K/4

In the reaction,

2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}

Option 1)

11.2\, L\, H_{2(g)}  at STP  is produced for every mole HCL_{(aq)}  consumed

Option 2)

6L\, HCl_{(aq)}  is consumed for ever 3L\, H_{2(g)}      produced

Option 3)

33.6 L\, H_{2(g)} is produced regardless of temperature and pressure for every mole Al that reacts

Option 4)

67.2\, L\, H_{2(g)} at STP is produced for every mole Al that reacts .

How many moles of magnesium phosphate, Mg_{3}(PO_{4})_{2} will contain 0.25 mole of oxygen atoms?

Option 1)

0.02

Option 2)

3.125 × 10-2

Option 3)

1.25 × 10-2

Option 4)

2.5 × 10-2

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

Option 1)

decrease twice

Option 2)

increase two fold

Option 3)

remain unchanged

Option 4)

be a function of the molecular mass of the substance.

With increase of temperature, which of these changes?

Option 1)

Molality

Option 2)

Weight fraction of solute

Option 3)

Fraction of solute present in water

Option 4)

Mole fraction.

Number of atoms in 558.5 gram Fe (at. wt.of Fe = 55.85 g mol-1) is

Option 1)

twice that in 60 g carbon

Option 2)

6.023 × 1022

Option 3)

half that in 8 g He

Option 4)

558.5 × 6.023 × 1023

A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t2) newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m2 , the number of rotations made by the pulley before its direction of motion if reversed, is

Option 1)

less than 3

Option 2)

more than 3 but less than 6

Option 3)

more than 6 but less than 9

Option 4)

more than 9

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Bio Medical Engineer

The field of biomedical engineering opens up a universe of expert chances. An Individual in the biomedical engineering career path work in the field of engineering as well as medicine, in order to find out solutions to common problems of the two fields. The biomedical engineering job opportunities are to collaborate with doctors and researchers to develop medical systems, equipment, or devices that can solve clinical problems. Here we will be discussing jobs after biomedical engineering, how to get a job in biomedical engineering, biomedical engineering scope, and salary. 

4 Jobs Available
Ethical Hacker

A career as ethical hacker involves various challenges and provides lucrative opportunities in the digital era where every giant business and startup owns its cyberspace on the world wide web. Individuals in the ethical hacker career path try to find the vulnerabilities in the cyber system to get its authority. If he or she succeeds in it then he or she gets its illegal authority. Individuals in the ethical hacker career path then steal information or delete the file that could affect the business, functioning, or services of the organization.

3 Jobs Available
GIS Expert

GIS officer work on various GIS software to conduct a study and gather spatial and non-spatial information. GIS experts update the GIS data and maintain it. The databases include aerial or satellite imagery, latitudinal and longitudinal coordinates, and manually digitized images of maps. In a career as GIS expert, one is responsible for creating online and mobile maps.

3 Jobs Available
Data Analyst

The invention of the database has given fresh breath to the people involved in the data analytics career path. Analysis refers to splitting up a whole into its individual components for individual analysis. Data analysis is a method through which raw data are processed and transformed into information that would be beneficial for user strategic thinking.

Data are collected and examined to respond to questions, evaluate hypotheses or contradict theories. It is a tool for analyzing, transforming, modeling, and arranging data with useful knowledge, to assist in decision-making and methods, encompassing various strategies, and is used in different fields of business, research, and social science.

3 Jobs Available
Geothermal Engineer

Individuals who opt for a career as geothermal engineers are the professionals involved in the processing of geothermal energy. The responsibilities of geothermal engineers may vary depending on the workplace location. Those who work in fields design facilities to process and distribute geothermal energy. They oversee the functioning of machinery used in the field.

3 Jobs Available
Database Architect

If you are intrigued by the programming world and are interested in developing communications networks then a career as database architect may be a good option for you. Data architect roles and responsibilities include building design models for data communication networks. Wide Area Networks (WANs), local area networks (LANs), and intranets are included in the database networks. It is expected that database architects will have in-depth knowledge of a company's business to develop a network to fulfil the requirements of the organisation. Stay tuned as we look at the larger picture and give you more information on what is db architecture, why you should pursue database architecture, what to expect from such a degree and what your job opportunities will be after graduation. Here, we will be discussing how to become a data architect. Students can visit NIT Trichy, IIT Kharagpur, JMI New Delhi

3 Jobs Available
Remote Sensing Technician

Individuals who opt for a career as a remote sensing technician possess unique personalities. Remote sensing analysts seem to be rational human beings, they are strong, independent, persistent, sincere, realistic and resourceful. Some of them are analytical as well, which means they are intelligent, introspective and inquisitive. 

Remote sensing scientists use remote sensing technology to support scientists in fields such as community planning, flight planning or the management of natural resources. Analysing data collected from aircraft, satellites or ground-based platforms using statistical analysis software, image analysis software or Geographic Information Systems (GIS) is a significant part of their work. Do you want to learn how to become remote sensing technician? There's no need to be concerned; we've devised a simple remote sensing technician career path for you. Scroll through the pages and read.

3 Jobs Available
Budget Analyst

Budget analysis, in a nutshell, entails thoroughly analyzing the details of a financial budget. The budget analysis aims to better understand and manage revenue. Budget analysts assist in the achievement of financial targets, the preservation of profitability, and the pursuit of long-term growth for a business. Budget analysts generally have a bachelor's degree in accounting, finance, economics, or a closely related field. Knowledge of Financial Management is of prime importance in this career.

4 Jobs Available
Data Analyst

The invention of the database has given fresh breath to the people involved in the data analytics career path. Analysis refers to splitting up a whole into its individual components for individual analysis. Data analysis is a method through which raw data are processed and transformed into information that would be beneficial for user strategic thinking.

Data are collected and examined to respond to questions, evaluate hypotheses or contradict theories. It is a tool for analyzing, transforming, modeling, and arranging data with useful knowledge, to assist in decision-making and methods, encompassing various strategies, and is used in different fields of business, research, and social science.

3 Jobs Available
Underwriter

An underwriter is a person who assesses and evaluates the risk of insurance in his or her field like mortgage, loan, health policy, investment, and so on and so forth. The underwriter career path does involve risks as analysing the risks means finding out if there is a way for the insurance underwriter jobs to recover the money from its clients. If the risk turns out to be too much for the company then in the future it is an underwriter who will be held accountable for it. Therefore, one must carry out his or her job with a lot of attention and diligence.

3 Jobs Available
Finance Executive
3 Jobs Available
Product Manager

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.  

3 Jobs Available
Operations Manager

Individuals in the operations manager jobs are responsible for ensuring the efficiency of each department to acquire its optimal goal. They plan the use of resources and distribution of materials. The operations manager's job description includes managing budgets, negotiating contracts, and performing administrative tasks.

3 Jobs Available
Stock Analyst

Individuals who opt for a career as a stock analyst examine the company's investments makes decisions and keep track of financial securities. The nature of such investments will differ from one business to the next. Individuals in the stock analyst career use data mining to forecast a company's profits and revenues, advise clients on whether to buy or sell, participate in seminars, and discussing financial matters with executives and evaluate annual reports.

2 Jobs Available
Researcher

A Researcher is a professional who is responsible for collecting data and information by reviewing the literature and conducting experiments and surveys. He or she uses various methodological processes to provide accurate data and information that is utilised by academicians and other industry professionals. Here, we will discuss what is a researcher, the researcher's salary, types of researchers.

2 Jobs Available
Welding Engineer

Welding Engineer Job Description: A Welding Engineer work involves managing welding projects and supervising welding teams. He or she is responsible for reviewing welding procedures, processes and documentation. A career as Welding Engineer involves conducting failure analyses and causes on welding issues. 

5 Jobs Available
Transportation Planner

A career as Transportation Planner requires technical application of science and technology in engineering, particularly the concepts, equipment and technologies involved in the production of products and services. In fields like land use, infrastructure review, ecological standards and street design, he or she considers issues of health, environment and performance. A Transportation Planner assigns resources for implementing and designing programmes. He or she is responsible for assessing needs, preparing plans and forecasts and compliance with regulations.

3 Jobs Available
Environmental Engineer

Individuals who opt for a career as an environmental engineer are construction professionals who utilise the skills and knowledge of biology, soil science, chemistry and the concept of engineering to design and develop projects that serve as solutions to various environmental problems. 

2 Jobs Available
Safety Manager

A Safety Manager is a professional responsible for employee’s safety at work. He or she plans, implements and oversees the company’s employee safety. A Safety Manager ensures compliance and adherence to Occupational Health and Safety (OHS) guidelines.

2 Jobs Available
Conservation Architect

A Conservation Architect is a professional responsible for conserving and restoring buildings or monuments having a historic value. He or she applies techniques to document and stabilise the object’s state without any further damage. A Conservation Architect restores the monuments and heritage buildings to bring them back to their original state.

2 Jobs Available
Structural Engineer

A Structural Engineer designs buildings, bridges, and other related structures. He or she analyzes the structures and makes sure the structures are strong enough to be used by the people. A career as a Structural Engineer requires working in the construction process. It comes under the civil engineering discipline. A Structure Engineer creates structural models with the help of computer-aided design software. 

2 Jobs Available
Highway Engineer

Highway Engineer Job Description: A Highway Engineer is a civil engineer who specialises in planning and building thousands of miles of roads that support connectivity and allow transportation across the country. He or she ensures that traffic management schemes are effectively planned concerning economic sustainability and successful implementation.

2 Jobs Available
Field Surveyor

Are you searching for a Field Surveyor Job Description? A Field Surveyor is a professional responsible for conducting field surveys for various places or geographical conditions. He or she collects the required data and information as per the instructions given by senior officials. 

2 Jobs Available
Orthotist and Prosthetist

Orthotists and Prosthetists are professionals who provide aid to patients with disabilities. They fix them to artificial limbs (prosthetics) and help them to regain stability. There are times when people lose their limbs in an accident. In some other occasions, they are born without a limb or orthopaedic impairment. Orthotists and prosthetists play a crucial role in their lives with fixing them to assistive devices and provide mobility.

6 Jobs Available
Pathologist

A career in pathology in India is filled with several responsibilities as it is a medical branch and affects human lives. The demand for pathologists has been increasing over the past few years as people are getting more aware of different diseases. Not only that, but an increase in population and lifestyle changes have also contributed to the increase in a pathologist’s demand. The pathology careers provide an extremely huge number of opportunities and if you want to be a part of the medical field you can consider being a pathologist. If you want to know more about a career in pathology in India then continue reading this article.

5 Jobs Available
Veterinary Doctor
5 Jobs Available
Speech Therapist
4 Jobs Available
Gynaecologist

Gynaecology can be defined as the study of the female body. The job outlook for gynaecology is excellent since there is evergreen demand for one because of their responsibility of dealing with not only women’s health but also fertility and pregnancy issues. Although most women prefer to have a women obstetrician gynaecologist as their doctor, men also explore a career as a gynaecologist and there are ample amounts of male doctors in the field who are gynaecologists and aid women during delivery and childbirth. 

4 Jobs Available
Audiologist

The audiologist career involves audiology professionals who are responsible to treat hearing loss and proactively preventing the relevant damage. Individuals who opt for a career as an audiologist use various testing strategies with the aim to determine if someone has a normal sensitivity to sounds or not. After the identification of hearing loss, a hearing doctor is required to determine which sections of the hearing are affected, to what extent they are affected, and where the wound causing the hearing loss is found. As soon as the hearing loss is identified, the patients are provided with recommendations for interventions and rehabilitation such as hearing aids, cochlear implants, and appropriate medical referrals. While audiology is a branch of science that studies and researches hearing, balance, and related disorders.

3 Jobs Available
Oncologist

An oncologist is a specialised doctor responsible for providing medical care to patients diagnosed with cancer. He or she uses several therapies to control the cancer and its effect on the human body such as chemotherapy, immunotherapy, radiation therapy and biopsy. An oncologist designs a treatment plan based on a pathology report after diagnosing the type of cancer and where it is spreading inside the body.

3 Jobs Available
Anatomist

Are you searching for an ‘Anatomist job description’? An Anatomist is a research professional who applies the laws of biological science to determine the ability of bodies of various living organisms including animals and humans to regenerate the damaged or destroyed organs. If you want to know what does an anatomist do, then read the entire article, where we will answer all your questions.

2 Jobs Available
Actor

For an individual who opts for a career as an actor, the primary responsibility is to completely speak to the character he or she is playing and to persuade the crowd that the character is genuine by connecting with them and bringing them into the story. This applies to significant roles and littler parts, as all roles join to make an effective creation. Here in this article, we will discuss how to become an actor in India, actor exams, actor salary in India, and actor jobs. 

4 Jobs Available
Acrobat

Individuals who opt for a career as acrobats create and direct original routines for themselves, in addition to developing interpretations of existing routines. The work of circus acrobats can be seen in a variety of performance settings, including circus, reality shows, sports events like the Olympics, movies and commercials. Individuals who opt for a career as acrobats must be prepared to face rejections and intermittent periods of work. The creativity of acrobats may extend to other aspects of the performance. For example, acrobats in the circus may work with gym trainers, celebrities or collaborate with other professionals to enhance such performance elements as costume and or maybe at the teaching end of the career.

3 Jobs Available
Video Game Designer

Career as a video game designer is filled with excitement as well as responsibilities. A video game designer is someone who is involved in the process of creating a game from day one. He or she is responsible for fulfilling duties like designing the character of the game, the several levels involved, plot, art and similar other elements. Individuals who opt for a career as a video game designer may also write the codes for the game using different programming languages.

Depending on the video game designer job description and experience they may also have to lead a team and do the early testing of the game in order to suggest changes and find loopholes.

3 Jobs Available
Radio Jockey

Radio Jockey is an exciting, promising career and a great challenge for music lovers. If you are really interested in a career as radio jockey, then it is very important for an RJ to have an automatic, fun, and friendly personality. If you want to get a job done in this field, a strong command of the language and a good voice are always good things. Apart from this, in order to be a good radio jockey, you will also listen to good radio jockeys so that you can understand their style and later make your own by practicing.

A career as radio jockey has a lot to offer to deserving candidates. If you want to know more about a career as radio jockey, and how to become a radio jockey then continue reading the article.

3 Jobs Available
Choreographer

The word “choreography" actually comes from Greek words that mean “dance writing." Individuals who opt for a career as a choreographer create and direct original dances, in addition to developing interpretations of existing dances. A Choreographer dances and utilises his or her creativity in other aspects of dance performance. For example, he or she may work with the music director to select music or collaborate with other famous choreographers to enhance such performance elements as lighting, costume and set design.

2 Jobs Available
Social Media Manager

A career as social media manager involves implementing the company’s or brand’s marketing plan across all social media channels. Social media managers help in building or improving a brand’s or a company’s website traffic, build brand awareness, create and implement marketing and brand strategy. Social media managers are key to important social communication as well.

2 Jobs Available
Photographer

Photography is considered both a science and an art, an artistic means of expression in which the camera replaces the pen. In a career as a photographer, an individual is hired to capture the moments of public and private events, such as press conferences or weddings, or may also work inside a studio, where people go to get their picture clicked. Photography is divided into many streams each generating numerous career opportunities in photography. With the boom in advertising, media, and the fashion industry, photography has emerged as a lucrative and thrilling career option for many Indian youths.

2 Jobs Available
Producer

An individual who is pursuing a career as a producer is responsible for managing the business aspects of production. They are involved in each aspect of production from its inception to deception. Famous movie producers review the script, recommend changes and visualise the story. 

They are responsible for overseeing the finance involved in the project and distributing the film for broadcasting on various platforms. A career as a producer is quite fulfilling as well as exhaustive in terms of playing different roles in order for a production to be successful. Famous movie producers are responsible for hiring creative and technical personnel on contract basis.

2 Jobs Available
Copy Writer

In a career as a copywriter, one has to consult with the client and understand the brief well. A career as a copywriter has a lot to offer to deserving candidates. Several new mediums of advertising are opening therefore making it a lucrative career choice. Students can pursue various copywriter courses such as Journalism, Advertising, Marketing Management. Here, we have discussed how to become a freelance copywriter, copywriter career path, how to become a copywriter in India, and copywriting career outlook. 

5 Jobs Available
Vlogger

In a career as a vlogger, one generally works for himself or herself. However, once an individual has gained viewership there are several brands and companies that approach them for paid collaboration. It is one of those fields where an individual can earn well while following his or her passion. 

Ever since internet costs got reduced the viewership for these types of content has increased on a large scale. Therefore, a career as a vlogger has a lot to offer. If you want to know more about the Vlogger eligibility, roles and responsibilities then continue reading the article. 

3 Jobs Available
Publisher

For publishing books, newspapers, magazines and digital material, editorial and commercial strategies are set by publishers. Individuals in publishing career paths make choices about the markets their businesses will reach and the type of content that their audience will be served. Individuals in book publisher careers collaborate with editorial staff, designers, authors, and freelance contributors who develop and manage the creation of content.

3 Jobs Available
Journalist

Careers in journalism are filled with excitement as well as responsibilities. One cannot afford to miss out on the details. As it is the small details that provide insights into a story. Depending on those insights a journalist goes about writing a news article. A journalism career can be stressful at times but if you are someone who is passionate about it then it is the right choice for you. If you want to know more about the media field and journalist career then continue reading this article.

3 Jobs Available
Editor

Individuals in the editor career path is an unsung hero of the news industry who polishes the language of the news stories provided by stringers, reporters, copywriters and content writers and also news agencies. Individuals who opt for a career as an editor make it more persuasive, concise and clear for readers. In this article, we will discuss the details of the editor's career path such as how to become an editor in India, editor salary in India and editor skills and qualities.

3 Jobs Available
Reporter

Individuals who opt for a career as a reporter may often be at work on national holidays and festivities. He or she pitches various story ideas and covers news stories in risky situations. Students can pursue a BMC (Bachelor of Mass Communication), B.M.M. (Bachelor of Mass Media), or MAJMC (MA in Journalism and Mass Communication) to become a reporter. While we sit at home reporters travel to locations to collect information that carries a news value.  

2 Jobs Available
Corporate Executive

Are you searching for a Corporate Executive job description? A Corporate Executive role comes with administrative duties. He or she provides support to the leadership of the organisation. A Corporate Executive fulfils the business purpose and ensures its financial stability. In this article, we are going to discuss how to become corporate executive.

2 Jobs Available
Multimedia Specialist

A multimedia specialist is a media professional who creates, audio, videos, graphic image files, computer animations for multimedia applications. He or she is responsible for planning, producing, and maintaining websites and applications. 

2 Jobs Available
Welding Engineer

Welding Engineer Job Description: A Welding Engineer work involves managing welding projects and supervising welding teams. He or she is responsible for reviewing welding procedures, processes and documentation. A career as Welding Engineer involves conducting failure analyses and causes on welding issues. 

5 Jobs Available
QA Manager
4 Jobs Available
Quality Controller

A quality controller plays a crucial role in an organisation. He or she is responsible for performing quality checks on manufactured products. He or she identifies the defects in a product and rejects the product. 

A quality controller records detailed information about products with defects and sends it to the supervisor or plant manager to take necessary actions to improve the production process.

3 Jobs Available
Production Manager
3 Jobs Available
Product Manager

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.  

3 Jobs Available
QA Lead

A QA Lead is in charge of the QA Team. The role of QA Lead comes with the responsibility of assessing services and products in order to determine that he or she meets the quality standards. He or she develops, implements and manages test plans. 

2 Jobs Available
Structural Engineer

A Structural Engineer designs buildings, bridges, and other related structures. He or she analyzes the structures and makes sure the structures are strong enough to be used by the people. A career as a Structural Engineer requires working in the construction process. It comes under the civil engineering discipline. A Structure Engineer creates structural models with the help of computer-aided design software. 

2 Jobs Available
Process Development Engineer

The Process Development Engineers design, implement, manufacture, mine, and other production systems using technical knowledge and expertise in the industry. They use computer modeling software to test technologies and machinery. An individual who is opting career as Process Development Engineer is responsible for developing cost-effective and efficient processes. They also monitor the production process and ensure it functions smoothly and efficiently.

2 Jobs Available
QA Manager
4 Jobs Available
AWS Solution Architect

An AWS Solution Architect is someone who specializes in developing and implementing cloud computing systems. He or she has a good understanding of the various aspects of cloud computing and can confidently deploy and manage their systems. He or she troubleshoots the issues and evaluates the risk from the third party. 

4 Jobs Available
Azure Administrator

An Azure Administrator is a professional responsible for implementing, monitoring, and maintaining Azure Solutions. He or she manages cloud infrastructure service instances and various cloud servers as well as sets up public and private cloud systems. 

4 Jobs Available
Computer Programmer

Careers in computer programming primarily refer to the systematic act of writing code and moreover include wider computer science areas. The word 'programmer' or 'coder' has entered into practice with the growing number of newly self-taught tech enthusiasts. Computer programming careers involve the use of designs created by software developers and engineers and transforming them into commands that can be implemented by computers. These commands result in regular usage of social media sites, word-processing applications and browsers.

3 Jobs Available
Product Manager

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.  

3 Jobs Available
Information Security Manager

Individuals in the information security manager career path involves in overseeing and controlling all aspects of computer security. The IT security manager job description includes planning and carrying out security measures to protect the business data and information from corruption, theft, unauthorised access, and deliberate attack 

3 Jobs Available
ITSM Manager
3 Jobs Available
Automation Test Engineer

An Automation Test Engineer job involves executing automated test scripts. He or she identifies the project’s problems and troubleshoots them. The role involves documenting the defect using management tools. He or she works with the application team in order to resolve any issues arising during the testing process. 

2 Jobs Available
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