BITSAT SERIES

Physics

Calorimetry

10 previous year questions.

Volume: 10 Ques

Yield: Medium

High-Yield Trend

1

2021

1

2020

1

2018

1

2017

1

2016

1

2012

1

2011

3

2010

Chapter Questions
10 MCQs

01

PYQ 2010

medium

physics ID: bitsat-2

One kilogram of ice at 0C is mixed with one kilogram of water at 80C. The final temperature of the mixture is (Take specific heat of water = 4200J kg⁻¹K⁻¹, Latent heat of ice = 336kJ kg⁻¹)

1

0C

2

40C

3

50C

4

60C

02

PYQ 2010

medium

physics ID: bitsat-2

3 moles of an ideal gas at temperature 27C are mixed with 2 moles of an ideal gas at temperature 227C. Determine the equilibrium temperature of the mixture, assuming no loss of energy.

1

327C

2

107C

3

318C

4

410C

03

PYQ 2010

medium

physics ID: bitsat-2

One kilogram of ice at is mixed with one kilogram of water at . The final temperature of the mixture is (Take specific heat of water, Latent heat of ice)

1

2

3

4

04

PYQ 2011

medium

physics ID: bitsat-2

A copper sphere cools from 62°C to 50°C in 10 minutes and to 42°C in next 10 minutes. Calculate the temperature of surroundings.

1

18.01°C

2

26°C

3

10.6°C

4

20°C

05

PYQ 2012

medium

physics ID: bitsat-2

A solid body of constant heat capacity 1 J/°C is being heated by keeping it in contact with reservoirs in two ways:

1

Sequentially keeping in contact with 2 reservoirs such that each reservoir supplies same amount of heat.

2

Sequentially keeping in contact with 8 reservoirs such that each reservoir supplies same amount of heat.

3

Sequentially keeping in contact with 2 reservoirs such that each reservoir supplies different amount of heat.

4

Sequentially keeping in contact with 8 reservoirs such that each reservoir supplies different amount of heat.

06

PYQ 2016

medium

physics ID: bitsat-2

Two spheres of different materials, one with double the radius and one-fourth the thickness of the other, are filled with ice. If the time taken for complete melting of the larger sphere is 25 minutes and for the smaller one is 16 minutes, the ratio of thermal conductivities of the materials of the larger sphere to that of the smaller sphere is:

1

2

3

4

8:25

07

PYQ 2017

medium

physics ID: bitsat-2

During vaporisation: I. change of state from liquid to vapour state occurs. II. temperature remains constant. III. both liquid and vapour states coexist in equilibrium. IV. specific heat of substance increases. Correct statements are

1

I, II and IV

2

I, III and IV

3

II, III and IV

4

I, II and III

08

PYQ 2018

medium

physics ID: bitsat-2

Water of volume 2 liters in a container is heated with a coil of 1 kW at 27°C. The lid is open, and energy dissipates at a rate of 160 J/s. In how much time will the temperature rise from 27°C to 77°C? (Given specific heat of water = 4.2 kJ/kgK)

1

8 min 20 s

2

6 min 2 s

3

7 min

4

14 min

09

PYQ 2020

medium

physics ID: bitsat-2

Two spheres of different materials, one with double the radius and one-fourth wall thickness of the other, are filled with ice. If the time taken for complete melting of ice in the larger sphere is 25 minutes and for the smaller one is 16 minutes, the ratio of thermal conductivities of the materials of larger spheres to that of smaller sphere is:

1

2

3

4

8:25

10

PYQ 2021

medium

physics ID: bitsat-2

During vapourisation I. change of state from liquid to vapour state occurs. II. temperature remains constant. III. both liquid and vapour states coexist in equilibrium. IV. specific heat of substance increases. Correct statements are

1

I, III and IV

2

II, III and IV

3

I, III and IV

4

I, II and III