Thermodynamics (KVPY Stream-SA (Class 11) Physics): Questions 1 - 4 of 9

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 242 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 200.00 or

Question number: 1

» Thermodynamics » Thermal Equilibrium

Appeared in Year: 2011

MCQ▾

Question

The following three objects (1) a metal tray, (2) a block of wood, and (3) a woolen cap are left in a closed room overnight. Next day the temperature of each is recorded as T 1, T 2 and T 3 respectively. The likely situation is.

Choices

Choice (4) Response

a.

T3=T2>T1

b.

T3>T2=T1

c.

T1=T2=T3

d.

T3>T2>T1

Question number: 2

» Thermodynamics » Concept of Temperature

Appeared in Year: 2012

MCQ▾

Question

150 g of ice is mixed with 100 g of water at temperature 800C. The latent heat of ice is 80 cal/g and the specific heat of water is 1 cal/g-0C. Assuming no heat loss to the environment, the amount of ice which does not melt is:

Choices

Choice (4) Response

a.

0 g

b.

150 g

c.

50 g

d.

100 g

Question number: 3

» Thermodynamics » Thermal Equilibrium

MCQ▾

Question

A magnesium piece of mass 30 g initially at 350 °C is dipped quickly and taken out of 1 kg of water, initially at 45° C. if the temperature of the magnesium piece immediately after being taken out of the water is found to be 180°C, what is the temperature of the water then? (Specific heat capacities of magnesium and water are 1020 J kg–1 K–1 and 4200 J kg–1, respectively. )

Choices

Choice (4) Response

a.

23.5°C

b.

48°C

c.

38.65°C

d.

46.24°C

Question number: 4

» Thermodynamics » Concept of Temperature

Appeared in Year: 2014

MCQ▾

Question

A thin paper cup filled with water does not catch fire when placed over a flame. This is because

Choices

Choice (4) Response

a.

Paper is a poor conductor of heat

b.

The paper cup does not become appreciably hotter than the water it contain

c.

The water cuts off oxygen supply to the paper cup

d.

Water is an excellent conductor of heat

Sign In