If the absolute temperature of a gas is doubled and the pressure of the gas is halved, how will the volume change?

A. It will increase by four times its original value

B. It will decrease by four times its original value

Everyday Science · Physics in Everyday Life · page 7 of 41

Heat & Thermodynamics MCQs with Answers

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Heat & Thermodynamics MCQs (61–70)

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61.
Enthalpy of reaction is same whether the reaction takes place in one or several steps. This is known as?
Correct Answer: A. Hess's law
One-liner
The statement refers to Hess's law, which states that the total enthalpy change of a reaction is independent of the path taken.
62.
Which of the following produces more severe burn?
Correct Answer: B. Steam
One-liner
Steam produces a more severe burn than boiling water because it contains extra latent heat of vaporization.
63.
How many scales are there to measure temperature?
Correct Answer: B. 3
One-liner
There are 3 commonly used scales to measure temperature: Celsius, Fahrenheit, and Kelvin.
64.
The freezing point depends upon _?
Correct Answer: C. Pressure
One-liner
The freezing point of a substance depends upon pressure; changes in pressure can raise or lower the temperature at which a liquid turns into a solid.
65.
The boiling point of water on a centigrade scale is?
Correct Answer: A. 100°C
One-liner
The boiling point of water on the centigrade (Celsius) scale is 100°C at standard atmospheric pressure.
66.
If the absolute temperature of a gas is doubled and the pressure of the gas is halved, how will the volume change?
Correct Answer: A. It will increase by four times its original value
One-liner
The volume will increase by four times its original value.
67.
What is the SI unit of thermal conductivity?
Correct Answer: D. W/(m·K)
One-liner
The SI unit of thermal conductivity is W/(m·K) (watt per metre per kelvin).
68.
Past Paper MCQ
By what percentage does water expand when it freezes?
Correct Answer: C. 9%
One-liner
Water expands by approximately 9% in volume when it freezes into ice.
69.
The measurable quantities that describe the condition of a system are called?
Correct Answer: A. State variables
One-liner
The measurable quantities that describe the condition of a system are called state variables.
70.
In which mode does heat transfer occur in solids?
Correct Answer: A. Conduction
One-liner
Heat transfer in solids occurs through conduction, where thermal energy is passed from particle to particle without the movement of the material itself.

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Heat & Thermodynamics MCQs with Answers

Heat & Thermodynamics MCQs (61–70)

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