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Heat & Thermodynamics - Expansion of Matter MCQs

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Heat & Thermodynamics - Expansion of Matter

Heat & Thermodynamics - Expansion of Matter MCQs With Answers

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CSS - PMS - CCE - PCS - General Science Heat & Thermodynamics - Expansion of Matter
Water has an unusual expansion behavior near which temperature?
A. 0 K only
B. 50°C
C. 100°C only
D. 4°C
Correct Answer: D
Liquid water reaches maximum density near 4°C and expands when cooled below this point.
CSS - PMS - CCE - PCS - General Science Heat & Thermodynamics - Expansion of Matter
Does heating generally change the mass of a solid in ordinary thermal expansion?
A. Mass changes into temperature
B. Mass becomes zero
C. No, mass remains essentially unchanged
D. Yes, mass always doubles
Correct Answer: C
Thermal expansion changes dimensions, not the amount of matter.
CSS - PMS - CCE - PCS - General Science Heat & Thermodynamics - Expansion of Matter
Which device uses unequal thermal expansion of two metals?
A. Microscope
B. Ammeter
C. Barometer
D. Bimetallic strip thermostat
Correct Answer: D
Two bonded metals with different expansion coefficients bend as temperature changes.
CSS - PMS - CCE - PCS - General Science Heat & Thermodynamics - Expansion of Matter
Why are expansion gaps left in bridges and railway tracks?
A. To increase electrical resistance
B. To allow thermal expansion without buckling or damage
C. To absorb sound only
D. To reduce gravity
Correct Answer: B
Structures need room to expand and contract as temperature changes.
CSS - PMS - CCE - PCS - General Science Heat & Thermodynamics - Expansion of Matter
What is linear expansion?
A. Change in length due to temperature change
B. Change in color
C. Change in mass
D. Change in charge
Correct Answer: A
Linear expansion concerns one-dimensional length change.
CSS - PMS - CCE - PCS - General Science Heat & Thermodynamics - Expansion of Matter
What generally happens to most materials when heated?
A. They always contract
B. Their mass doubles
C. They expand
D. They become weightless
Correct Answer: C
Higher temperature usually increases average particle spacing.
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