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NCERT Exemplar Class 10 Science Solutions Chapter 14 Sources of Energy

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NCERT Exemplar Class 10 Science Solutions Chapter 14 Sources of Energy

Edited By Sumit Saini | Updated on Sep 09, 2022 03:17 PM IST | #CBSE Class 10th

NCERT exemplar Class 10 Science solutions chapter 14 helps understand the concept of different conventional and non-conventional sources of energy. The NCERT exemplar Class 10 Science chapter 14 solutions provide a good overview of this chapter. The solutions are helpful to solve NCERT Class 10 Science Book questions.

These NCERT exemplar Class 10 Science chapter 14 solutions are prepared by our teaching experts division keeping in view the necessity of details and comprehensiveness required to learn the chapter in the best practice. The NCERT exemplar Class 10 Science solutions chapter 14 explores all the aspects of the CBSE Syllabus Class 10.

NCERT Exemplar Class 10 Science Solutions Chapter 14-MCQ

Question:1

Which of the following is a non-renewable source of energy?
(A) Wood
(B) Sun
(C) Fossil fuels
(D) Wind
Answer : (C) fossil fuels
A nonrenewable resource is a natural substance that is not replenished with the speed at which it is consumed. It is a finite resource.
Examples: Fossil fuels, Crude Oil, Coal, Uranium, Natural Gas, Steel, Aluminum, Ground Water etc.
Wood – Can be replenished by growing more and more trees
Sun – It is not a finite resource
Fossil Fuels – Thermal power plants make use of fossil fuel for production of electricity and they are considered as non-renewable sources
Wind – It is not a finite resource
Therefore option (C) is correct

Question:2

Acid rain happens because
(A) sun leads to heating of upper layer of atmosphere
(B) burning of fossil fuels release oxides of carbon, nitrogen and sulphur in the atmosphere
(C) electrical charges are produced due to friction amongst clouds
(D) earth atmosphere contains acids
Answer : (B)
Burning of fossil fuels release oxides of carbon, nitrogen, and Sulphur in the atmosphere which gets dissolved in atmospheric water vapor and rains down as acid rain which damages the plant life, aquatic life, as well as the infrastructure. It has drastic effect on the soil as it changes the nutrition and pH of the soil.
Therefore option (B) is correct

Question:3

Fuel used in thermal power plants is
(A) water
(B) uranium
(C) biomass
(D) fossil fuels
Answer : (D) fossil fuels
Coal and petrol are the fuels used in thermal power plants. These fuels are burnt to produce energy which converts water into vapor which is passed onto turbines to produce electricity.
Therefore option (D) is correct

Question:4

In a hydro power plant
(A) Potential energy possessed by stored water is converted into electricity
(B) Kinetic energy possessed by stored water is converted into potential energy
(C) Electricity is extracted from water
(D) Water is converted into steam to produce electricity
Answer : (A)
Potential energy possessed by stored water is converted into electricity. As the potential energy converts into kinetic energy which rotates the turbine which in turn produces electricity. Hydro power plants are renewable sources of energy.
Therefore option (A) is correct

Question:5

Which is the ultimate source of energy?
(A) Water
(B) Sun
(C) Uranium
(D) Fossil fuels
Answer : (B)
Sun is the ultimate source of energy. Photosynthesis is driven by sunlight. All the producers in a food web make their food by absorbing sunlight. Solar energy has the potential to fulfill all power needs. All our fossil fuels are derived from plants which existed millions of years ago.
Therefore option (B) is correct

Question:6

Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilisation?
(A) Nuclear energy
(B) Thermal energy
(C) Solar energy
(D) Geothermal energy
Answer : (C)
(A) Nuclear reactors do not produce air pollution or carbon dioxide while operating. However, the processes for mining and refining uranium ore and making reactor fuel requires large amounts of energy which leads to environmental pollution
(B) Thermal energy leads to production of thermal gases by burning of fossil fuels and thermal pollution.
(C) Solar energy leads to least environmental pollution as there are no harmful products formed
(D) Methane and carbon dioxide are the most commonly released greenhouse gases which affects the environment. Noise pollution also happens in the case of geothermal energy because of drilling.
Therefore option (C) is correct

Question:7

Ocean thermal energy is due to
(A) energy stored by waves in the ocean
(B) temperature difference at different levels in the ocean
(C) pressure difference at different levels in the ocean
(D) tides arising out in the ocean
Answer : (B)
Ocean thermal energy conversion is a process for producing energy by harnessing the temperature differences between ocean surface waters and deep ocean waters.
Temperature difference at different levels in the ocean is due to the availability of sunlight. As the sunlight is prevalent on the surface which increases the temperature of water but inner layers won’t get the same amount of heat which in turn creates a temperature difference.
Therefore option (B) is correct

Question:8

The major problem in harnessing nuclear energy is how to
(A) split nuclei
(B) sustain the reaction
(C) dispose off spent fuel safely
(D) convert nuclear energy into electrical energy
Answer : (C)
The major problem in harnessing nuclear energy is how to dispose off spent fuel safely. The products are radioactive in nature which affects all the organisms who are exposed. Its effects are not confined to one place but to a major distance as the radiations can travel very long distance.
AERB is in charge of the public safety regarding ionizing radiation & nuclear energy.
Therefore option (C) is correct

Question:9

Which part of the solar cooker is responsible for green house effect?
(A) Coating with black colour inside the box
(B) Mirror
(C) Glass sheet
(D) Outer cover of the solar cooker
Answer : (C) Glass sheet
Glass sheet/plate traps infrared radiations from sunlight and does not allow heat to escape. Solar cookers are covered with a glass plate. Thus this glass plate provides greenhouse effect.
Under identical conditions, a black surface absorbs more heat as compared to a white or a reflecting surface. Solar cookers achieve a higher temperature by using mirrors to focus the rays of the Sun.
Therefore option (C) is correct

Question:10

The main constituent of biogas is
(A) methane
(B) carbon dioxide
(C) hydrogen
(D) hydrogen sulphide
Answer : (A)
Biogas is a renewable energy source composed of methane, carbon dioxide, and other trace compounds produced from anaerobic digestion of organic matter.
Bio gas composition:
Methane CH4 55%-75%
Carbon dioxide CO2 25% - 40%
Rest are trace gases like hydrogen etc.
Biogas is predominantly made from the excretion of cows and buffalos. This is the reason they produce a lot of methane gas.
Therefore option (A) is correct

Question:11

The power generated in a windmill
(A) is more in rainy season since damp air would mean more air mass hitting the blades
(B) depends on the height of the tower
(C) depends on wind velocity
(D) can be increased by planting tall trees close to the tower
Answer : (C)
A windmill converts wind power into rotational energy
Power output of a windmill depends on wind velocity as the kinetic energy of the moving wind is used to rotate the mill which is connected to a turbine which produces electricity. The minimum required speed for a windmill to work is 15km/hr
Therefore option (C) is correct

Question:12

Choose the correct statement
(A) Sun can be taken as an inexhaustible source of energy
(B) There is infinite storage of fossil fuel inside the earth
(C) Hydro and wind energy plants are non polluting sources of energy
(D) Waste from a nuclear power plant can be easily disposed off
Answer : (a,c)
(A) Sun can be taken as an inexhaustible source of energy as the energy is produced through nuclear fusion reaction. The Sun has been radiating an enormous amount of energy at the present rate for nearly 5 billion years and will continue radiating at that rate for about 5 billion years more.
(B) There is a finite storage of fossil fuels.
(C) Hydro and wind energy plants are non-polluting sources of energy as they don’t produce pollutants.
(D) Waste from a nuclear power plant is very difficult to dispose off.
Therefore options (A, C) are correct

Question:13

In a hydroelectric power plant more electrical power can be generated if water falls from a greater height because
(A) its temperature increases
(B) larger amount of potential energy is converted into kinetic energy
(C) the electricity content of water increases with height
(D) more water molecules dissociate into ions
Answer : (B)
Potential energy is directly proportional to the height. So more the height, more will be the potential energy.
In hydroelectric power plant if water falls from a greater height, a large amount of potential energy is converted into kinetic energy which in turn is converted into electric energy.
Therefore option (B) is correct

Question:14

Choose the incorrect statement regarding wind power
(A) It is expected to harness wind power to minimum in open space
(B) The potential energy content of wind blowing at high altitudes is the source of wind power
(C) Wind hitting at the blades of a windmill causes them to rotate The rotation thus achieved can be utilised further
(D) One possible method of utilising the energy of rotational motion of the blades of a windmill is to run the turbine of an electric generator
Answer : (A, B)
(A) It is expected to harness wind power to minimum in open space – Incorrect as in open spaces wind flows easily and wind power is highest.
(B) The potential energy content of wind blowing at high altitudes is the source of wind power – Incorrect as wind power is completely dependent on the wind speed and not the altitude. That’s why we see wind mills in coastal areas due to high wind speeds than in high altitude areas
(C) and (D) are correct.
Therefore options (A, B) are correct

Question:15

Choose the incorrect statement
(A) We are encouraged to plant more trees so as to ensure clean environment and also provide bio-mass fuel
(B) Gobar gas is produced when crops, vegetable wastes etc., decompose in the absence of oxygen
(C) The main ingredient of bio-gas is ethane and it gives a lot of smoke and also produces a lot of residual ash
(D) Bio-mass is a renewable source of energy
Answer : (C)
(A) Correct. More plants means cleaner and healthier environment. More trees will provide more bio-mass fuel.
(B) Correct. Gobar gas is produced when crops, vegetable wastes etc., decompose in the absence of oxygen
(C) Incorrect. The main ingredient of bio-gas is methane and not ethane.
(D) Correct. Bio-mass is a renewable source of energy as it depends on the growth of plants and trees which are renewable.
Therefore option (C) is correct

NCERT Exemplar Class 10 Science Solutions Chapter 14-Short Answer

Question:16

Why is there a need to harness non-conventional sources of energy? Give two main reasons.
Answer:
i) As the population is increasing, energy requirements of the world are constantly increasing and in order to fulfil these requirements, we need to consider non-conventional energy sources.
ii) Majority of sources of energy we use are fossil fuel based which are non-renewable and most of them are damaging the climate by causing pollution. So we need to use non-conventional energy sources which do not damage the environment.

Question:17

Write two different ways of harnessing energy from ocean.
Answer :
1) Tidal Energy: It is the energy obtained from the rising and falling tides. Because of the gravitational pull of the moon on the spinning earth, the level of water in the sea rises and falls. Tidal energy is harnessed by building a dam across a narrow opening to the sea.
2) Ocean Thermal Energy: Energy obtained due to the temperature difference between the deep layers of ocean and upper level of ocean.

Question:18

What steps would you suggest to minimise environmental pollution caused by burning of fossil fuels?
Answer :
1) Afforestation: Converting land into forest by planting trees
2) Use clean fuels like CNG, LPG etc.
3) Use public transport, carpool, electric vehicles etc.
4) Use smokeless appliances and upgrade to fuel efficient systems

Question:19

What is the role of a plane mirror and a glass sheet in a solar cooker?
Answer :
1) Plane Mirror in a cooker is used as a reflector to focus maximum rays of sun in to the cooker.
2) Glass Sheet allows the infrared and visible rays to enter the device. It also does not allow the infrared radiations to move out of the heating device to increase the wavelength of radiation inside the cooker which further increases the temperature.

Question:20

Mention three advantages of a solar cell?
Answer:
Three advantages of Solar cells:
1. Pollution free
2. Maintenance cost is almost zero
3. It is an unlimited source

Question:21

What is biomass? What can be done to obtain bio-energy using biomass?
Answer:
Bio-mass it is the waste materials of living things (cattle dung etc.) and dead parts of plants, animals and any organic source.
Bio-energy in the form of biogas can be produced from biomass by decomposition in the absence of air. Bioenergy refers to electricity and gas that is generated from organic matter, known as biomass.

Question:22

What are the limitations in obtaining energy from wind?
Answer:
Limitations of wind energy
1) It should be established only in the places where the wind blows throughout the year.
2) Minimum wind speed necessary for wind energy is 15km/hr which is difficult at all times throughout the year.
3) Wind energy farms are expensive to set.
4) Wind Energy farms effect the rainfall patterns.
5) Energy is stored in batteries which is another thing to consider and we cannot completely rely on it as it is constantly varying based on wind speeds.

NCERT Exemplar Class 10 Science Solutions Chapter 14-Long Answer

Question:23

Which is the process used to harness nuclear energy these days? Explain it briefly.
Answer:
Nuclear reaction is a process of making energy from radioactive substances as of now humans harness nuclear energy from nuclear fission process. Nuclear fission is a process where a heavy unstable nucleus breaks in to stable nucleus and releases energy. In a nuclear reactor, uranium nucleus is bombarded with neutrons and the nucleus turns unstable and breaks into two smaller nuclei and releases energy. This energy is used to convert liquid water into high energy steam. Further this steam is passed over turbines which rotates and generates electricity (alternating current)
Nuclear Reaction
_{92}^{235}\textrm{U}+_{0}^{1}\textrm{n}\rightarrow _{92}^{236}\textrm{U}\rightarrow _{56}^{144}\textrm{Ba}+_{36}^{89}\textrm{Kr}+3_{0}^{1}\textrm{n}+\text {Energy}
E = Δmc2 where E = energy released
m = difference in mass of the original nucleus and product nuclei
c = velocity of light [3 x 108 m/s]
This energy is expressed in terms of electron volt [eV]
1eV = 1.602 x 1019 J
Major draw backs of Nuclear Power:
1) There is no proper, cheap way to dispose nuclear waste as it is bio hazardous.
2) Risk of accidental leakage is very high and it will lead to lot of medical complications.
3) If the reaction is not controlled properly then we will be facing dire consequences.
4) Cost of installation is pretty high and requires high maintenance.

Question:24

How can solar energy be harnessed? Mention any two limitations in using solar energy. How are these limitations overcome?
Answer:

There are two ways solar energy is harnessed:
Indirect Way: Lot of organisms absorb sunlight and make their food (autotrophs) which are the primary food sources in a food chain. This energy is passed on to higher trophic levels.
Direct Way: Using solar panels to absorb solar energy and converting into electrical energy. The various devices which are used to convert the solar energy into various usable forms are solar cooker, solar heater, solar power plants, solar furnaces and solar cells.
Limitations of solar energy:
1) Cost of initial set up is very high.
2) The distribution of solar energy is not uniform. For example, European nations have less sunlight as they are close to poles but nations like Africa, Saudi Arabia, India has a lot of sunlight all around the year.
3) Takes a lot of area to set up solar energy farms.
4) Solar energy is not available in night time so energy needs to be stored in battery and used in night.
5) Based on moment of sun and clouds lot the energy output of solar panels will vary all the time.
The limitations can be overcome by:
Use of solar cells: Converting solar energy into electrical energy and storing them for future use.
A large number of solar cells combined in an arrangement is called a solar cell panel. It can deliver enough electricity for practical use.

Question:25

Make a list of conventional and non-conventional sources of energy. Give a brief description of harnessing one nonconventional source of energy.
Answer:
Conventional sources of energy are non-renewable sources of energy. Non-conventional sources of energy are renewable sources of energy.
Conventional Source of energy:
1. Coal
2. Petrol
3. Wood
4. Hydro Energy
5. Biomass energy
6. Wind Energy
Non-Conventional Energy:
1. Solar Energy
2. Tidal Energy
3. Geothermal energy
4. Nuclear energy
Harnessing of Nuclear Energy: It is a process of making energy from radioactive substances. As of now humans harness nuclear energy from nuclear fission process. Nuclear fission is a process where a heavy unstable nucleus breaks into stable nuclei and releases energy. In a nuclear reactor, uranium nucleus is bombarded with neutrons and the nucleus turns unstable and breaks into two smaller nucleus and releases energy. This energy is used to convert liquid water into high energy steam. Further this steam is passed over to turbines which rotate and generate electricity.

Question:26

Why is there a need for harnessing non-conventional sources of energy? How can energy be harnessed from the sea in different ways?
Answer:
Non-conventional sources of energy are renewable sources of energy. Examples:
1. Solar Energy
2. Tidal Energy
3. Geothermal energy
4. Nuclear energy
Reasons for harnessing non-conventional sources energy:
1. Demand for energy is increasing day by day. Increasing human activities and increasing demand of electricity has to be met. Changing life-styles, rapid industrialisation and population explosion demands increase in human needs.
2. All the predominant forms of energy we use are fossil fuel based and are responsible for pollution and global warming. Moreover, these are non-renewable resources.
Different forms from which energy can be harnessed from sea:
1. Tidal energy: Harnessing energy from the mechanical energy of the tides in sea. This method is not used predominantly but the tides are regular all the time so has a potential to be an alternative for fossil fuels.
2. Ocean Thermal energy: Ocean thermal energy conversion is a process for producing energy by harnessing the temperature differences between ocean surface waters and deep ocean waters.
Temperature difference at different levels in the ocean is due to the availability of sunlight. As the sunlight is prevalent on the surface which increases the temperature of water but inner layers won’t get the same amount of heat which in turn creates a temperature difference.

Question:27

What are the environmental consequences of using fossil fuels?
Suggest the steps to minimise the pollution caused by various sources of energy including non-conventional sources of energy.

Answer:
Environmental consequences of using fossil fuel:
1) Burning of fossil fuel leads to air pollution and incomplete combustion produces health hazard gases like carbon monoxide etc.
2) Oxides of nitrogen and carbon will lead to acid rains.
3) Generation of greenhouse gases lead to global warming.
Some of the steps to minimize pollution:
1) Reduce the consumption of fossil fuels by using public transport and use of non-conventional resources like solar, wind etc.
2) Converting vehicles from petrol and diesel to liquid petroleum gas and compressed natural gas and even using electric vehicles.
3) Using energy efficient equipment like 5 star or 4 star rated electrical equipment.
4) Plant more trees as they consume carbon dioxide and release oxygen into atmosphere.

Question:28

Energy from various sources is considered to have been derived from the sun. Do you agree? Justify your answer.
Answer:
Yes, sun is the ultimate source of energy as all the producers on earth make their food using sunlight and rest of the organisms consume or feed on producers.
Non-renewable resources like coal, petrol and natural gases are living organisms which got buried in the ground and due to high pressure and temperature in the earth, has turned into fossil fuels. But they got their initial energy form sun only.
Renewable sources are also indirectly dependent on sun.
Wind energy: Harnessing energy from wind is wind energy and wind is possible due to the uneven heating of earth’s surface. For example, land gets heated easily compared to water which in turn produces hot and cold gas which is nothing but high energy and low energy gas respectively.
Bio energy: Harnessing energy from living organisms like wood, cow dung etc. into biogas which are products of life. These are dependent directly on sun or indirectly on sun by feeding on producers.
Wave energy: Harnessing energy from waves which are dependent on the wind speed which is a phenomenon due to uneven heating of earth’s surface.
Solar energy: Harnessing energy form Sun’s radiation is directly dependent on Sun.
So yes, we can conclude that Sun is the source for all the forms of energy on this planet directly or indirectly.

Question:29

What is biomass? Explain the principle and working of a biogas plant using a labelled schematic diagram.
Answer:
Bio mass means the organic fuel obtained from plants and animal’s waste like cow dung, dry wood, vegetable waste and sewage etc.
Cow-dung, various plant materials like the residue after harvesting the crops, vegetable waste and sewage are decomposed in the absence of oxygen to give bio-gas or locally called as ‘gobar-gas’ due to the predominant use of cow dung.
Bio gas plant has a dome-like structure built with bricks. A slurry of cow-dung and water is made in the mixing tank from where it is fed into the digester. The digester is a sealed chamber in which oxygen is completely absent. Anaerobic micro-organisms that do not require oxygen to decompose complex compounds of the cow-dung slurry. After a few days for the decomposition process is complete and generate gases like methane, carbon dioxide, hydrogen and hydrogen sulphide. All this gas is known as bio gas which is stored in the gas tank above the digester from which they are drawn through pipes for use.

NCERT Exemplar Solutions Class 10 Science Chapter 14 Important Topics:

  • In this chapter, students will learn about different conventional and non-conventional sources of energy.
  • NCERT exemplar Class 10 Science solutions chapter 14 discusses abundant sources and ceasing sources of energy.
  • In this chapter, students will learn about solar energy, wind energy, petroleum energy, and other sources of energy.
  • In this chapter, students will understand the difference between different types of energy such as electrical energy chemical energy, and mechanical energy.

NCERT Class 10 Exemplar Solutions for Other Subjects:

NCERT Class 10 Science Exemplar Solutions for Other Chapters:

Features of NCERT Exemplar Class 10 Science Solutions Chapter 14:

  • These Class 10 Science NCERT exemplar chapter 14 solutions provide an understanding of a source of energy.

  • We know that we need energy for any work. We require energy for transportation and many other works.

  • This chapter involves learning about different sources of energy and types of energy.

  • To better learn and practice Sources of Energy-related practice questions, the Class 10 students can refer to these Class 10 Science NCERT exemplar solutions chapter 14 Sources of Energy and take complete advantage of their accurate and comprehensive nature.

  • These Class 10 Science NCERT exemplar solutions chapter 14 can prepare the students well for attempting other books such as Physics question bank, NCERT Class 10 Science, S.Chand by Lakhmir Singh and Manjit Kaur et cetera.

Check NCERT Solutions for questions given in the book

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Frequently Asked Question (FAQs)

1. Q1. Why excess use of fuels like petrol and diesel are prohibited?

A1. We know that we have a limited number of sources of petrol or diesel that is why it is always advised to save petrol or diesel.

2. Q2. What is ocean thermal energy?

A2. Oceans are very deep and different layers of ocean have different temperatures, due to this difference in temperature it possesses thermal energy.

3. Q3. What is biogas?

A3. It is the mixture of gases formed by the breakdown of living organisms. The main composition of biogas is methane and carbon dioxide

4. Q4. How does windmill work?

A4. At higher altitude, wind velocity will be generally higher than lower altitude. By the power of wind, the blades of turbines rotate and electricity is generated within the windmill.

5. Q5. Is it possible to download these solutions and view them in offline mode?

A5. NCERT exemplar Class 10 Science solutions chapter 14 pdf download feature provides this facility to the student for the ease of learning process while attempting NCERT exemplar Class 10 Science chapter 14.

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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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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
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
Geotechnical engineer

The role of geotechnical engineer starts with reviewing the projects needed to define the required material properties. The work responsibilities are followed by a site investigation of rock, soil, fault distribution and bedrock properties on and below an area of interest. The investigation is aimed to improve the ground engineering design and determine their engineering properties that include how they will interact with, on or in a proposed construction. 

The role of geotechnical engineer in mining includes designing and determining the type of foundations, earthworks, and or pavement subgrades required for the intended man-made structures to be made. Geotechnical engineering jobs are involved in earthen and concrete dam construction projects, working under a range of normal and extreme loading conditions. 

3 Jobs Available
Cartographer

How fascinating it is to represent the whole world on just a piece of paper or a sphere. With the help of maps, we are able to represent the real world on a much smaller scale. Individuals who opt for a career as a cartographer are those who make maps. But, cartography is not just limited to maps, it is about a mixture of art, science, and technology. As a cartographer, not only you will create maps but use various geodetic surveys and remote sensing systems to measure, analyse, and create different maps for political, cultural or educational purposes.

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
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
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
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
Investment Director

An investment director is a person who helps corporations and individuals manage their finances. They can help them develop a strategy to achieve their goals, including paying off debts and investing in the future. In addition, he or she can help individuals make informed decisions.

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
Plumber

An expert in plumbing is aware of building regulations and safety standards and works to make sure these standards are upheld. Testing pipes for leakage using air pressure and other gauges, and also the ability to construct new pipe systems by cutting, fitting, measuring and threading pipes are some of the other more involved aspects of plumbing. Individuals in the plumber career path are self-employed or work for a small business employing less than ten people, though some might find working for larger entities or the government more desirable.

2 Jobs Available
Construction Manager

Individuals who opt for a career as construction managers have a senior-level management role offered in construction firms. Responsibilities in the construction management career path are assigning tasks to workers, inspecting their work, and coordinating with other professionals including architects, subcontractors, and building services engineers.

2 Jobs Available
Urban Planner

Urban Planning careers revolve around the idea of developing a plan to use the land optimally, without affecting the environment. Urban planning jobs are offered to those candidates who are skilled in making the right use of land to distribute the growing population, to create various communities. 

Urban planning careers come with the opportunity to make changes to the existing cities and towns. They identify various community needs and make short and long-term plans accordingly.

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
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
Naval Architect

A Naval Architect is a professional who designs, produces and repairs safe and sea-worthy surfaces or underwater structures. A Naval Architect stays involved in creating and designing ships, ferries, submarines and yachts with implementation of various principles such as gravity, ideal hull form, buoyancy and stability. 

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
Veterinary Doctor
5 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
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
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
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
Hospital Administrator

The hospital Administrator is in charge of organising and supervising the daily operations of medical services and facilities. This organising includes managing of organisation’s staff and its members in service, budgets, service reports, departmental reporting and taking reminders of patient care and services.

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
Videographer
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
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
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
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
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
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
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
Linguist

Linguistic meaning is related to language or Linguistics which is the study of languages. A career as a linguistic meaning, a profession that is based on the scientific study of language, and it's a very broad field with many specialities. Famous linguists work in academia, researching and teaching different areas of language, such as phonetics (sounds), syntax (word order) and semantics (meaning). 

Other researchers focus on specialities like computational linguistics, which seeks to better match human and computer language capacities, or applied linguistics, which is concerned with improving language education. Still, others work as language experts for the government, advertising companies, dictionary publishers and various other private enterprises. Some might work from home as freelance linguists. Philologist, phonologist, and dialectician are some of Linguist synonym. Linguists can study French, German, Italian

2 Jobs Available
Public Relation Executive
2 Jobs Available
Travel Journalist

The career of a travel journalist is full of passion, excitement and responsibility. Journalism as a career could be challenging at times, but if you're someone who has been genuinely enthusiastic about all this, then it is the best decision for you. Travel journalism jobs are all about insightful, artfully written, informative narratives designed to cover the travel industry. Travel Journalist is someone who explores, gathers and presents information as a news article.

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
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
Production Manager
3 Jobs Available
Merchandiser
2 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
Metallurgical Engineer

A metallurgical engineer is a professional who studies and produces materials that bring power to our world. He or she extracts metals from ores and rocks and transforms them into alloys, high-purity metals and other materials used in developing infrastructure, transportation and healthcare equipment. 

2 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
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
QA Manager
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
ITSM 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
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
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