Heat and Thermodynamics MCQ question and answer with solution

91

What is the value of 273 K?

A) 100 K B) 10 K C) 10°C D) 0°C

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

92

Amount of heat per unit mass required to change a substance from a solid to a liquid at the same temperature and pressure.

A) Latent heat of liquefaction B) Resilience by the above method C) Vaporization D) Sublimation

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

93

When water freezes its density

A) decreases B) becomes zero C) remains constant D) increases

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

94

Which one of the following statement regarding a thermo flask is not correct?

A) The walls of flask are separated by vacuum and made of glass which is a poor conductor of heat B) The glass walls themselves have shiny surfaces C) The surface of inner wall radiates good amount of heat and the surface of outer wall absorbs some of the heat that is radiated from the inner wall D) The cork supports are poor conductors of heat

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

95

According to Wien's Law

A) λ_mT = constant B) $$\frac{{{\lambda _m}}}{T}$$ = constant C) $$\frac{T}{{{\lambda _m}}}$$ = constant D) T + λ_m = constant

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

96

If the temperature of a place increases suddenly, the relative humidity

A) increases B) decreases C) remains constant D) fluctuates

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

97

Woolen clothes keep the body warm in winter because-

A) Wool is a bad conductor of heat B) Wool is a good conductor of heat C) Wool increases body temperature D) Wool decreases body temperature

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

98

In an Earthen pitcher, the water remains cold due to the process of

A) Condensation B) Evaporation C) Sublimation D) None of the above

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

99

The boiling point of an alcohol is 78°C. What is the temperature on the Kelvin scale?

A) 78 K B) 341 K C) 373 K D) 351 K

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

100

The most important function of perspiration is to

A) Regulate body temperature B) Regulate body water supply C) Get rid of body poison D) Keep the skin pores clear of dirt

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

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