Properties of Solids & Liquids (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 172 - 174 of 190

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Question number: 172

» Properties of Solids & Liquids » Specific Heat Capacity

MCQ▾

Question

Heat is supplied to a certain homogenous sample of matter, at a uniform rate. Its temperature is plotted against time, as shown. Which of the following conclusions can be drawn?

(1) Its specific heat capacity is greater in the liquid state than in the solid state

(2) Its latent heat of vaporization is greater than its latent heat of fusion

(3) Its specific heat capacity is greater in the solid state than in the liquid state

(4) Its latent heat of vaporization is smaller than its latent heat or fusion

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1, 2 and 3 are correct

b.

1 and 2 are correct

c.

2 and 4 are correct

d.

1 and 3 are correct

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Question number: 173

» Properties of Solids & Liquids » Heat Transfer » Conduction

MCQ▾

Question

Three rods of the same dimension have thermal conductivities 3K, 2K and K. They are arranged as shown in fig. with their ends at 100°C, 50°C and 20°C. The temperature of their junction is

Choices

Choice (4) Response

a.

70°C

b.

60°C

c.

50°C

d.

35°C

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Question number: 174

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

Flask is filled up to a mark with 40 cc of mercury at 20°C. If the flask and contents are heated to 30°C, how much mercury will be above the mark? (α for glass is 9 × 10 -6 /°C and coefficient of real expansion of mercury is 180 × 10 -6 /°C

Choices

Choice (4) Response

a.

0.0708 cc

b.

0.0005

c.

0.8500 cc

d.

0.0153 cc

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