Heat and Thermodynamics MCQ question and answer with solution

41

Which of the following criteria is used for any metal to be used as a cooking material?

A) More specific heat B) More thermal conductivity C) Less thermal conductivity D) Less electrical conductivity

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Answer & Solution

Answer: Option B

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42

Why two thin shirts can keep us warmer than a single thick shirt in winter?

A) Two thin shirts become thicker so prevent transmission of heat B) Air layer between two shirts works as good conductor C) Air layer between two shirts behaves like insulating media D) No radiation of heat takes place

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Answer & Solution

Answer: Option C

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43

The normal temperature of human body is 98.4°F. It's equivalent temperature (in °C) is

A) 40.16 B) 36.89 C) 35.72 D) 32.36

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Answer & Solution

Answer: Option B

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44

At which temperature is the density of water maximum?

A) 247 K B) 244 K C) 277 K D) 273 K

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Answer & Solution

Answer: Option C

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45

The temperature at which a liquid changes from its liquid state to a solid state is called-

A) Solid state B) Melting point C) Freezing point D) Boiling point

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Answer & Solution

Answer: Option C

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46

If the work done on the system or by the system is zero, then which one of the following statement for a gas kept at a certain temperature is correct?

A) Change in internal energy of the system is equal to flow of the heat in or out of the system B) Change in internal energy of the system is less than heat transferred C) Change in internal energy of the system is more than the heat flow D) Cannot be determined

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Answer & Solution

Answer: Option A

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47

The absolute zero temperature is 0°K. In °C unit, which one of the following is the absolute zero temperature?

A) 0°C B) -100°C C) -273.15°C D) -173.15°C

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Answer & Solution

Answer: Option C

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48

What will be the boiling point of water in the Kelvin scale?

A) 100 K B) 273 K C) 373 K D) 300 K

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Answer & Solution

Answer: Option C

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49

In the night wind blows fast, dew is not formed because

A) Rate of evaporation is fast B) Moisture in air is low C) Temperature is high D) Sky is not clear

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Answer & Solution

Answer: Option A

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50

Food gets cooked faster in a pressure cooker because

A) Water starts boiling at a lower temperature due to high pressure B) Water starts boiling at a higher temperature due to high pressure C) Water boils only at 100°C but the heat content is higher at high pressure D) Convection currents are set inside the cooker

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Answer & Solution

Answer: Option B

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Heat and Thermodynamics MCQ question and answer with solution | Physics Gk MCQs