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NCERT Exemplar Class 11 Physics Solutions Chapter 10 Mechanical Properties of Fluids

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NCERT Exemplar Class 11 Physics Solutions Chapter 10 Mechanical Properties of Fluids

Edited By Safeer PP | Updated on Aug 08, 2022 05:25 PM IST

NCERT Exemplar Class 11 Physics solutions chapter 10 covers the fluidic properties of two states of matter; gas and liquid. Both of these have fluid-like properties because they can flow from one place to another, unlike solids. They do not have any particular shape, and instead, they take the shape of the container they are stored in. Fluids also act easily under any type of pressure, which will give rise to many real-world applications like barometer and manometer. All these properties have given rise to various theorems and rules, which play a major role in mechanical physics in higher education. Students can also check NCERT Class 11 Physics Solutions. In this chapter and NCERT exemplar Class 11 Physics solutions chapter 10 various topics comprising the pressure, viscosity, cohesion, and some major theorems are discussed in detail.

Also, check NCERT Solutions for Class 11 other subjects

NCERT Exemplar Class 11 Physics Solutions Chapter 10: MCQI

Question:10.1

A tall cylinder is filled with viscous oil. A round pebble is dropped from the top with zero initial velocity. From the plot shown in figure, indicate the one that represents the velocity (v) of the pebble as a function of time (t).

Answer:

The answer is the option (c)
When a cylinder is filled with viscous oil and a pebble is dropped from the top, it falls under the effect of gravity and acceleration due to this force. When it enters the oil, a dragging force f = 6 \pi r n v acts opposite, and hence the acceleration of the pebble decreases till it becomes zero and the velocity becomes constant. Hence option c is correct.

Question:10.2

Which of the following diagrams does not represent a streamline flow?

Answer:

The answer is the option (d)
The velocity remains constant for a liquid in case of a streamlined flow. So, the layers do not cross each other. And hence, d is the correct choice.

Question:10.3

Along a streamline
a) the velocity of a fluid particle remains constant
b) the velocity of all fluid particles crossing a given position is constant
c) the velocity of all fluid particles at a given instant is constant
d) the speed of a fluid particle remains constant

Answer:

The answer is the option (b) the velocity of all fluid particles crossing a given position is constant.

The speed at any point or any cross-section for a liquid is constant in case of a streamlined flow.

Question:10.4

An ideal fluid flows through a pipe of circular cross-section made of two sections with diameters 2.5 cm and 3.75 cm. The ratio of the velocities in the two pipes is
a) 9:4
b) 3:2
c) \sqrt{3}:\sqrt{2}
d) \sqrt{2}:\sqrt{3}

Answer:

The answer is the option (a) 9:4
a1 v1 = a2 v2
\frac{v1}{v2}= \frac{a2}{a1}
\frac{v1}{v2} =\frac{ d2^{2}}{d1^{2}}
putting values,
\frac{v1}{v2} = \frac{\left ( 3.75 \times 3.75 \right )}{2.5 \times 2.5} =\frac{9}{4}
so, v1: v2 = 9:4. Hence option a is correct.

Question:10.5

The angle of contact at the interface of water-glass is 0^{\circ}, ethylalcohol-glass is 0^{\circ}, mercury-glass is 140^{\circ}, and methyl iodide-glass is 30^{\circ}. A glass capillary is put in a trough containing one of these four liquids. It is observed that the meniscus is convex. The liquid in the trough is
a) water
b) ethylalcohol
c) mercury
d) methyliodide

Answer:

The answer is the option (c) Mercury.
In the case of mercury glass, the meniscus of liquid is convex, which makes the angle of contact obtuse. Hence option c is the correct choice.

NCERT Exemplar Class 11 Physics Solutions Chapter 10: MCQII

Question:10.6

For a surface molecule
a) the net force on it is zero
b) there is a net downward force
c) the potential energy is less than that of a molecule inside
d) the potential energy is more than that of a molecule inside

Answer:

The answer is the option (b) and (d)
The force exerted on a molecule by all other neighbouring molecules is equal and opposite in all directions. Hence the horizontal component is zero.
A downward force acts vertically, which is not cancelled and hence b is the correct option.
The potential energy of the molecules on the surface is negative as compared to the molecules in the subsequent layers. But the magnitude of this PE is higher than the below molecules. Hence option d is also correct.

Question:10.7

Pressure is a scalar quantity because
a) it is the ratio of force to area and both force and area are vectors
b) it is the ratio of the magnitude of the force to area
c) it is the ratio of component of the force normal to the area
d) it does not depend on the size of the area chosen

Answer:

The answer is the option (c)
The pressure is nothing but a component of some force acting along a particular area. The directions here are fixed for both these quantities which make pressure a scalar quantity. Hence option c is the right choice.

Question:10.8

A wooden block with a coin placed on its top, floats in water as shown in figure:

The distance l and h are shown in the figure. After some time the coin falls into the water. Then
a) l decreases
b) h decreases
c) l increases
d) h increases

Answer:

The answer is the option (a) and (b)
The amount of displaced fluid is equal to the weight of the floating body; this is as per the floatation principle. When the coin is dropped, the net force acting on the block decreases as the coin displaces water in an equivalent amount to its weight. This is the reason that the block rises up. As the block rises, l decreases. The height h will also decrease as the amount of water getting displaced now will be lesser. Hence option a and b are correct.

Question:10.9

With increase in temperature, the viscosity of
a) gases decreases
b) liquids increases
c) gases increases
d) liquids decreases

Answer:

The answer is the option (c) and (d)
If n is the coefficient of viscosity of a liquid, n\propto \frac{1}{\sqrt{T}}
In case of the viscosity of gases, n\propto \sqrt{T}
As the temperature increases, kinetic energy in the gas molecules also increases and hence due to the collisions between the molecules, the viscosity increases.
Whereas in case of a liquid, the kinetic energy increases with temperature, but the relative speed of the layers of liquid remains fairly the same as before. Hence option c and d are correct.

Question:10.1

Streamline flow is more likely for liquids with
a) high density
b) high viscosity
c) low density
d) low viscosity

Answer:

The answer is the option (b) and (c)
Liquids which have a lesser density are more subjected to a streamline flow. The velocity gradient of liquid increases with its viscosity. Hence the line of flows can be differentiated accordingly.
Reynold number, R =\frac{ pvD}{n}
As we increase n and decrease p, R decreases. This decrease in R makes the flow more streamlined. Hence options b and c are correct.

NCERT Exemplar Class 11 Physics Solutions Chapter 10: Very Short Answer

Question:10.11

Is viscosity a vector?

Answer:

Viscosity: the dragging force magnitude between two layers of a liquid per unit area, who have their velocity gradient as unity is called viscosity. This quantity just has a magnitude and no direction, and hence it is not a vector quantity.

Question:10.12

Is surface tension a vector?

Answer:

Surface tension = work done/ change in the surface area
These are scalar quantities, and hence surface tension is a scalar and not a vector quantity.

Question:10.13

Iceberg floats in water with part of it submerged. What is the fraction of the volume of iceberg submerged if the density of ice is\rho i = 0.917 \frac{g}{cm^{3}}?

Answer:

The weight of the iceberg is equal to the weight of the displaced liquid, as the iceberg is floating on the surface of the sea.
V Pi g = V Pw g
The volume of an iceberg submerged in water/ vol of iceberg = \frac{V^{'}}{V}=\frac{Pi}{Pw}=\frac{0.917}{1}
Hence the portion of the iceberg which is submerged in water is 0.917

Question:10.14

A vessel filled with water is kept on a weighing pan and the scale adjusted to zero. A block of mass M and density \rho is suspended by a massless spring of spring constant k. This block is submerged inside into the water in the vessel. What is the reading of the scale?

Answer:

The given figure has a beaker filled with water. The beaker has been placed on a weighing scale which is adjusted to zero.

As we submerge the block into the water, a force equal to the weight of the block acts upward in the form of a buoyant force. So, the downward force applied by the block equals to V Pw g
V = the water volume which is displaced by the block
Pw = density of water
Mass of block = M = V
V=\frac{M}{p}
So, the reading on the weighing scale reads:
\frac{M}{p}. p_w g = \frac{p_w}{p}Mg

Question:10.15

A cubical block of density \rho is floating on the surface of water. Out of its height L, fraction x is submerged in water. The vessel is in an elevator accelerating upwards with acceleration a. What is the fraction immersed?

Answer:


Through the principle of floatation when the block gets submerged in water
Vpg = V^{'} Pw g
Where V’ = volume of water displaced by block
V’ = base area of block x height of block inside the water
V^{'} = L^{2}x
Let V be the volume of the block and Pb by the density of the block
Hence,
V= L^{2}\times Pw
\frac{Pb}{Pw }=\frac{x}{L} ---------(1)
x =\frac{Pb}{Pw} L
as the block lifts upward, the acceleration = (g + a)
weight of L3 Pb block = m(g+a) = V \times Pb(g+a) = L^{3} Pb (g+a)
let x1 be the part of block which is submerged.
We know that the buoyant force will be equal and opposite to the weight of the block.
L^{3} Pb (g+a) = x1 L^{2} Pw (g+a)
So,
\frac{Pb}{Pw}=\frac{x1}{L}
So, x1=\frac{Pb}{Pw}L ------------(2)
From (1) and (2) we can infer that\frac{Pb}{Pw}L is the part of the block which is submerged in water. This is independent of the acceleration of the block (upwards, downwards or at rest)

Question:10.17

The free surface of oil in a tanker, at rest, is horizontal. If the tanker starts accelerating the free surface will be titled by an angle \theta. If the acceleration is a m/s2, what will be the slope of the free surface?

Answer:


Let us assume the tanker is pulled by a force F and it produces an acceleration in the forward direction. Let \deltam be the mass of a small element. As the tanker is pulled forward and accelerates, the small element also experiences a force in the same direction. The inertia of rest makes the element to remain at rest and hence as the tank moves forward, the element moves backwards as a result of inertia.
Force acting on \deltam, F1 = \deltama in the backward direction
F2 = \deltamg which is in a vertically downward direction.
The normal reaction gets balanced by various components: \deltama \sin \theta from F1
The situation when there is a maximum angle inclination by the surface,
\delta ma \cos \theta = \delta mg \sin \theta
So required slope, \frac{\sin \theta }{\cos \theta}=\frac{a}{g}
So, \tan \theta=\frac{a}{g}

Question:10.18

Two mercury droplets of radii 0.1 cm and 0.2 cm collapse into one single drop. What amount of energy is released? The surface tension of mercury T = 435.5 \times 10^{-3} \frac{N}{m}.

Answer:


Surface tension energy, E=\sigma \Delta A
As we can infer from the law of conservation of mass, the volume of a drop V = v1 + v2
r_1 = 0.1 cm = 0.001 m
r_2 = 0.2 cm = 0.002 m
\Delta A = 4 \pi r_1^{2} + 4 \pi r_2^{2} - 4\pi R^{2}
\Delta A = 4 \pi \left [r_1^{2} + r_2^{2}- R^{2} \right ]
The new bigger drop has a radius of R,
\frac{4}{3}\pi R^{3}=\frac{4}{3}\pi \left [ r_1^{3}+r_2^{3} \right ]
R^{3}= r_1^{3}+r_2^{3}
R^{3}= 9 \times 10^{-9}
R^{3}= 2.1 \times 10^{-3}m
Now, E=\sigma \Delta A
E = 4 \times 3.14 [(10^{-3})^{2} + (2 \times 10^{-3})^{2} - (2.1 \times 10^{-3})^{2}] \times 435.5 \times 10^{-3}
E = 1742 \times 3.14 \times 10^{-9} [0.59] = 5469.88 \times 0.59 \times 10^{-9}
E = 32.27 \times 10^{-7} J
Finally, the area will be smaller, when energy is released as the bigger drop is formed from smaller drops.

Question:10.19

If a drop of liquid breaks into smaller droplets, it results in lowering of temperature of the droplets. Let a drop of radius R, break into N small droplets each of radius r. Estimate the drop in temperature.

Answer:

now, \Delta E=\sigma
(final area - initial area) of surface
\Delta E=m s \Delta t
As per the law of conservation of mass,
Final volume =initial volume of one drop which has a radius R which is then split into N drops r
So, \frac{4}{3}\pi R^{3}=N.\frac{4}{3}\pi r^3
N.\frac{4}{3}\pi r^{3}ps\Delta t=4\pi\sigma \left [ Nr^{2}-R^{2} \right ]
\Delta t=\frac{4\pi \sigma \times 3}{N.4\pi r^{3}ps}\left [ Nr^{2}-R^{2} \right ]
\Delta t=\frac{3\sigma}{Nps}\left [ \frac{Nr^{2}}{r^{3}}-\frac{R^{2}}{r^{3}} \right ]
\Delta t=\frac{3\sigma N}{Nps}\left [ \frac{1}{r}-\frac{1}{R} \right ]
\Delta t=\frac{3\sigma}{ps}\left [ \frac{1}{r}-\frac{1}{R} \right ] as R>r
Hence, we can say that \Delta t will be positive and therefore, \frac{1}{R} < \frac{1}{r}
So, the temperature increases as the formation smaller drops take place, and this change takes place through absorption of energy through the surroundings.

Question:10.20

The surface tension and vapour pressure of water at 20^{\circ}C is 7.28 \times 10^{-2} \frac{N}{m} and 2.33 \times 10^{3} Pa, respectively. What is the radius of the smallest spherical water droplet which can form without evaporating at 20^{\circ}C?

Answer:

In case when the water pressure in the liquid is greater than the surface above the liquid, the drop will evaporate. We assume R to be the radius of the droplet before evaporation.
We know that pressure of vapour = pressure which becomes excess inside the drop
P=\frac{2\sigma}{R}
R = 2 \times 7.28 \times 10^{-2}/P =\frac{2 \times 7.28 \times 10^{-2}}{2.33 \times 1000 }= \frac{14560}{233}\times 100000
Hence, R= 6.25 \times 10^{-5} m

NCERT Exemplar Class 11 Physics Solutions Chapter 10: Long Answer

Question:10.21

a) Pressure decreases as one ascends the atmosphere. If the density of air is \rho, what is the change in pressure dp over a differential height dh?
b) Considering the pressure p to be proportional to the density, find the pressure p at a height h if the pressure on the surface of the earth is \rho _{0}.
c) If p_{0}=1.03 \times 10^{5}N/m^{2}, \rho _{0}=1.29\frac{kg}{m^{3}} and g is 9.8 \frac{m}{s^{2}} at what height will the pressure drop to (1/10) the value at the surface of the earth?
d) This model of the atmosphere works for relatively small distances. Identify the underlying assumption that limits the model.

Answer:

a) Let us assume that there is a packet which has a thickness of dh. In a liquid, at any point, the pressure is working in all the directions in an equal manner. The force as a result of the pressure is opposed by the buoyant force of the liquid.
(P + dP) A - P.A = - Vpg
dP A = - Adhpg
dP = - pgdh -----------(1) {since pressure decreases as height increases, the negative sign is present here}

b) let us assume Po to be the density of air on Earth.
At any point p, the pressure is directly proportional to the density
Hence,
p = \frac{P}{P_{0}}p_0
now, dP = pgdh
dP = \frac{P}{P_{0}}p_{0}gdh
\frac{dP}{P} = -p_{0}\frac{g}{P_{0}}dh
on integrating both sides we get,
\log \frac{P}{P_{0}} = \frac{-p_{0}}{P_0}gh -----------(3)
\frac{P}{P_{0}} =e ^{\frac{-p_{0}}{P_0}gh}
c)
we know that, \log \frac{P}{P_{0}} = \frac{-p_{0}}{P_0}gh
but, P=\frac{P_{0}}{10} (given)
\log \frac{\frac{P_{0}}{10}}{P_{0}}=\frac{-p_0gh}{P_{0}}
\log \frac{1}{10}=\frac{-p_0gh}{P_{0}}
h=\frac{P_{0}}{p_0g}\log 10
h = \frac{1.013 \times 10^5 \times 2.303}{1.29 \times 9.8} = 18.4 km
d)
the temperature does not remain constant at greater height. It only remains constant near the surface of the Earth.

Question:10.22

Surface tension is exhibited by liquids due to force of attraction between molecules of the liquid. The surface tension decreases with increase in temperature and vanishes at boiling point. Given that the latent heat of vaporization for water Lv = 540 k cal kg^{-1}, the mechanical equivalent of heat J = 4.2 J cal^{-1}, density of water \rho w = 103 kg l^{-1}, Avagadro’s number N_{A} = 6.0 \times 10^{26} k mole ^{-1} and the molecular weight of water M_{A} = 18 kg for 1 k mole.
(a) estimate the energy required for one molecule of water to evaporate.
(b) show that the inter–molecular distance for water is
d=\left [ \frac{M_{A}}{N_{A}}\times \frac{1}{\rho _{w}} \right ]^{\frac{1}{3}}
(c) 1 g of water in the vapor state at 1 atm occupies 1601 cm3. Estimate the intermolecular distance at boiling
point, in the vapour state.
(d) During vaporisation a molecule overcomes a force F, assumed constant, to go from an inter-molecular distance d to d ′ . Estimate the value of F where d=3.1x10-10m
(e) Calculate \frac{F}{d}, which is a measure of the surface tension.

Answer:

a) Lv = 540 k cal kg^{-1} = 540 \times 4.2 \times 1000 J/Kg
For evaporation of 1 kg water, energy required = Lv K Cal
For evaporation of Ma kg of water, La Ma K Cal
Number of molecules in Ma kg of water = Na
Hence, for the evaporation of 1 molecule, the energy required (U)= (Lv Ma/Na) K. Cal
U = \frac{Ma Lv \times 1000 \times 4.2}{Na} = \frac{18 \times 540 \times 1000 \times 4.2}{6 \times 10 ^{26}} = 6.8 \times 10 ^{-20} J
b)
water molecules are assumed to be of a point size and have distance d between each other
total volume of Na molecules of water = mass/density
=\frac{M_{a}}{p}
volume occupied by 1 molecule =
d^{3} = \frac{M_{a}}{N_{a}}\times p
d = \left [ \frac{M_{a}}{N_{a}} \times p \right ]^{\frac{1}{3}}
hence, the volume occupied by 1kg vapour = 1601 cm^3 = 1601 \times 10^{-6} m^3
c)
the volume occupied by 18kg water vapour = 18\times 1601 \times 10^{-6} cm^3
number of molecules in 18 kg water =6\times 10^{26}
so, the volume occupied by 1 molecule = \frac{18 \times 1601 \times 10^{-6} cm^{3}}{6 \times 10 ^{26}}
hence d^{'3}=\frac{18 \times 1601 \times 10^{-6} cm^{3}}{6 \times 10 ^{26}}
d^{'} = 36.3 \times 10 ^{-10} m
d) work done to change the distance to d’ from d = F (d’-d)
6.8 \times 10^{-20}= F (36.3 \times 10^{-10} - 3.1 \times 10^{-10}) = F \times 33.2 \times 10^{-10}
Hence, F = \frac{6.8 \times 10^{-20}}{33.2 \times 10^{-10}}
F = 2.05 \times 10 ^{-11} N

e)
from the formula of surface tension, we know that, surface tension = F/d
Surface tension = \frac{2.05 \times 10 ^{-11} N}{3.1 \times 10^{-10}}
Surface tension =6.6 \times 10^{-2} N/m

Question:10.23

A hot air balloon is a sphere of radius 8 m. The sir inside is at a temperature of 60^{\circ}C. How large a mass can the balloon lift when the outside temperature is 20^{\circ}C?

Answer:

The amount of pressure outside a balloon is lesser than the amount of pressure inside the balloon.

P_{i}-P_{0}=\frac{2\sigma}{R} {\sigma: surface tension, R: balloon’s radius}


Pi V = ni R Ti

Where, V is the volume of balloon and ni is number of moles of gas in the balloon

R is the gas constant, Ti is the temperature

ni = \frac{Pi V}{R Ti }= Mass of balloon (Mi)/Molecular mass (Ma)

Mi = \frac{Pi V Ma}{R Ti }-------------(1)

In the same way, n_{0} = \frac{P_{0} V}{R T_{0}}

According to principal of floatation, W + Mi g = M_{0} g, here W is the weight which the balloon lifts

W= (M_{0} - M_{i}) g

If the mass displaced by balloon is M0 and Ma is the mass inside or outside of the balloon

n_{0} = \frac{M_{0}}{M_{a}} = \frac{P_{0} V}{R T_{0}}

M_{0} =\frac{P_{0} V M_{a}}{R T_{0}}---------------(2)

Hence from (1) and (2) we can write,

W = \left [ \frac{P_{0} V Ma}{R T_{0} } -\frac{P_{i} V M_{a}}{R T_{i}}\right ] g

W = \frac{V M_{a}}{R}\left [ \frac{P_{0}}{T_{0}}-\frac{P_{i}}{T_{i}} \right ] g

Ma = 79% N2 + 21%O2

Ma = 0.79 \times 28 + 0.21 \times 32 = 28.84 g = 0.2884 kg

P_{i}-P_{0}=\frac{2\sigma}{R}

P_{i} = P_{o} + Pressure due to ST of membrane

Pi = \left [1.1013 \times 10^{5} + 2\times \frac{5}{8} \right ] = \sim 1.1013 \times 10^{5}

W = \frac{4}{3} \times \frac{3.14 \times 8 \times 8 \times 8\times 0.02884}{3\times 8.314} \left [\frac{1.013 \times 10^{5}}{293} - \frac{1.013 \times 10^{5}}{333} \right ]g

W = \frac{4}{3} \times \frac{3.14 \times 8 \times 8 \times 8\times 0.02884\times 1.013 \times 10^{5} }{3\times 8.314} \left [\frac{1}{293} - \frac{1}{333} \right ]g

W = 3044.2 N

An Insight To NCERT Exemplar Class 11 Physics Solutions Chapter 10

The NCERT questions from the main exercise and additional exercise are solved by our team of teachers. These solutions are exhaustive and effective in a better learning process. Students can easily download these solutions in PDF format for future reference and practice. Simply click on the download link of NCERT exemplar Class 11 Physics solutions chapter 10 pdf download and the file will get downloaded to the device for offline use.

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Topics in NCERT Exemplar Class 11 Physics Solutions Chapter 10

  • 1. Introduction
  • 2. Pressure
  • 3. Streamline flow
  • 4. Bernoulli's theorem
  • 5. Viscosity
  • 6. Reynolds number
  • 7. Surface tension
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What Will Students Learn From NCERT Exemplar Class 11 Physics Solutions Chapter 10?

The chapter on mechanical properties of fluids covers every property that makes the fluid act in a certain way under various factors like pressure, temperature, etc. in this chapter a student will learn in detail about the pressure and thrust in the liquid. The Class 11 Physics NCERT exemplar solutions chapter 10 covers two most crucial laws in fluid dynamics, called Pascal's law and Archimedes principle. These two laws explain how the fluid acts and reacts under pressure. One explains pressure distribution and one about fluid displacement.

This chapter also covers the equation of continuity of fluids passing through a cross-section and energy of liquids. Students will also learn about Bernoulli's theorem which tells about non-pressurized streamline flow in which the liquid will produce the same potential energy, pressure energy, and kinetic energy from NCERT Exemplar Class 11 Physics solutions chapter 10. Some of the other topics covered are surface tension, critical velocity, angle of contact, Torricelli's theorem, etc. Learning these topics, one will be one step closer to finding a better explanation in fluid dynamics applications like changing weather patterns, moving tectonic plates and ocean currents, etc.

NCERT Exemplar Class 11 Physics Solutions Chapter-Wise

NCERT Exemplar Class 11 Solutions

Important Topics To Cover From NCERT Exemplar Class 11 Physics Solutions Chapter 10

The Class 11 Physics NCERT exemplar solutions chapter 10 covers various characteristics of fluids like viscosity, surface tension, terminal velocity, surface energy, critical velocity, magnus effect, etc. these topics are covered to give a basic idea of how fluids react under pressure in various circumstances and how to measure the changes.

The learners will learn some of the basic yet major laws, theorems, and equations like Archimedes's principle, Pascal's law, Bernoulli's theorem, Torricelli's theorem, Stoke's law, Reynolds number, Poiseuille's equation, and equation of continuity.

The NCERT Exemplar Class 11 Physics solutions chapter 10 also cover some of the major applications of fluid dynamics like barometer and manometer and cover how they work and where they are used. This will make the students aware of real-world applications in Physics.

Check Class 11 Physics Chapter-wise Solutions

Also Check NCERT Books and NCERT Syllabus here

Frequently Asked Question (FAQs)

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Students can get a clear and better idea about the topics, and the theorems explained in the chapter and how they have to answer the questions in the exam. 

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From this chapter, all the questions mentioned in the MCQ and short and long answer type questions are solved in complete detail in NCERT exemplar class 11 physics chapter 10 solutions.

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Yes, these NCERT exemplar class 11 physics solutions chapter 10 are highly useful for those who are preparing for the entrance exams. One can make use of these solutions to understand questions in more depth.

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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

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0.34\; J

Option 2)

0.16\; J

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1.00\; J

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0.67\; J

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Option 1)

2.45×10−3 kg

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 6.45×10−3 kg

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 9.89×10−3 kg

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12.89×10−3 kg

 

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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

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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

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increase two fold

Option 3)

remain unchanged

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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

Data Administrator

Database professionals use software to store and organise data such as financial information, and customer shipping records. Individuals who opt for a career as data administrators ensure that data is available for users and secured from unauthorised sales. DB administrators may work in various types of industries. It may involve computer systems design, service firms, insurance companies, banks and hospitals.

4 Jobs Available
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

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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.

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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.

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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.

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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.

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Veterinary Doctor
5 Jobs Available
Speech Therapist
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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.

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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.

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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.

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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
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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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