Heat and Thermodynamics MCQ question and answer with solution

1

At boiling point of liquids, its

A) temperature increases B) atmospheric pressure increases C) temperature remains constant D) vapour pressure decreases

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Answer & Solution

Answer: Option C

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2

Mud houses are cooler in summers and warmer in winters as compared to brick houses because

A) mud is a good conductor B) mud is a bad conductor C) mud is a poor insulator D) evaporation of water causes cooling in summers and sunlight coming through holes causes warming in winters

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Answer & Solution

Answer: Option D

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3

Water is used in a hot water bag because

A) it is easily available B) it has high specific gravity C) it has high specific heat D) it has a liquid substance

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Answer & Solution

Answer: Option C

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4

Transfer of heat is mainly due to conduction, convection and radiation in-

A) Insulated pipes carrying hot water B) In the refrigerator C) In boiler furnaces D) Actual condensation in a condenser is the transfer of heat

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Answer & Solution

Answer: Option C

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5

Temperature reaches zero absolute value-

A) -273 K temperature B) In a state of vacuum C) At the center of the earth D) When the molecular speed of the system decreases to zero

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Answer & Solution

Answer: Option D

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6

Assertion and Reason are given below.
Assertion (A): We prefer the white dress in winters.
Reason (R): White dresses are good reflectors of heat.
Which one among these is the right answer.

A) Both (A) and (R) are true and (R) is the correct explanation of (A) B) Both (A) and (R) are true, but (R) is not the correct explanation of (A) C) (A) is true, but (R) is false D) (A) is false, but (R) is true

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Answer & Solution

Answer: Option D

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7

For which of the following process is the entropy change zero?

A) Isobaric B) Isothermal C) Adiabatic D) None of these

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Answer & Solution

Answer: Option C

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8

The temperature which has the same reading on both Fahrenheit and Celsius scales is

A) 40° B) -40° C) -34° D) -140°

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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