Heat & Thermodynamics MCQs with Answers

Which of the following is a good conductor of heat but a bad conductor of electricity?

• A.Copper
• B.Graphite
• C.Silver
• D.Mica

Water does not boil at ?

• A.212°K
• B.373°K
• C.272°K
• D.100°K

The heat of formation of CO and CO₂ are -26.4 Kcal and -94.0 Kcal respectively. The heat of combustion of carbon monoxide according to Hess's Law will be _?

• A.+67.6 Kcal
• B.-120.4 Kcal
• C.-67.6 Kcal
• D.-26.4 Kcal

The specific heat of lead is 0.030 cal/g°C. 300g of lead shot at 100°C is mixed with 100g of water at 70°C in an insulated container. The final temperature of the mixture is?

• A.72.5°C
• B.85.0°C
• C.78.2°C
• D.68.8°C

The temperature scale which is independent of the nature of the working substance is?

• A.Celsius scale
• B.Fahrenheit scale
• C.Thermodynamic scale
• D.Reaumur scale

In the Centigrade scale, the freezing point of water is _ and the boiling point of water is ?

• A.0°C, 100°C
• B.32°C, 212°C
• C.0°C, 212°C
• D.32°C, 100°C

The solar heat energy reaching the earth each year is more than ?

• A.100 times the world's energy need
• B.1000 times the world's energy need
• C.10000 times the world's energy need
• D.100000 times the world's energy need

Which factor does not depend on rate of evaporation?

• A.Temperature
• B.Surface area
• C.Amount of liquid
• D.Humidity

How many divisions does the Fahrenheit scale have?

• A.100
• B.180
• C.212
• D.273

A real gas obeying Van der Waals equation will resemble an ideal gas if ?

• A.a is small and b is smaller
• B.a is large and b is small
• C.both a and b are large
• D.both a and b are small