Properties of Solids & Liquids (NEET Physics): Questions 158 - 161 of 188

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Question number: 158

» Properties of Solids & Liquids » Latent Heat

MCQ▾

Question

A stationary object at 4° C and weighing 3.5 kg falls from a height of 2000 m on a snow mountain at 0° C. If the temperature of the object just before hitting the snow is 0°C and the object comes to rest immediately? (g = 10 m/s 2 and latent heat of ice = 3.5 × 10 5 joule/sec), then the object will melt

Choices

Choice (4) Response
a.

2 gm of ice

b.

2 kg of ice

c.

20 gm of ice

d.

200 gm of ice

Question number: 159

» Properties of Solids & Liquids » Heat Transfer » Radiation

MCQ▾

Question

A body cools from 90° C to 50° C in 10 minutes. If the room temperature is 25° C and assuming Newton’s law of cooling to hold good, the temperature of the body at the end of the next 10 minutes will be

Choices

Choice (4) Response
a.

56.40° C

b.

34.61° C

c.

46.75° C

d.

42.85° C

Question number: 160

» Properties of Solids & Liquids » Specific Heat Capacity

MCQ▾

Question

A beaker contains 400 gm of water. The heat capacity the beaker is equal to that of 20 gm of water. The initial temperature of water in the beaker is 20°C. If 240 gm hot water at 92°C is poured in it, the final temperature (neglecting radiation loss) will be nearest to

Choices

Choice (4) Response
a.

12.58°C

b.

46.18°C

c.

6.348°C

d.

73.4°C

Question number: 161

» Properties of Solids & Liquids » Surface Energy and Surface Tension

MCQ▾

Question

Radius of a capillary tube is 4 × 10 -3 m. A liquid of weight 5.20 × 10 -4 N may remain in the capillary tube then the surface tension of liquid will be

Choices

Choice (4) Response
a.

2.3 × 10 -2 N/m

b.

20 N/m

c.

2.0 × 10 -2 N/m

d.

20 × 10 -3 N/m

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