Heat MCQs (451–480) with Answers and Explanations help students practice objective questions on calorimetry calculations, thermal conductivity, and temperature scale conversions.
This Heat MCQ practice set is useful for school exams and competitive exams to revise heat transfer, specific heat, and latent heat concepts quickly.
451. The amount of heat contained in a body depends mainly on its:
Correct Answer: D
Heat energy depends on the mass and temperature of the body.
452. The heat required to raise the temperature of 1 kg of water by 1°C is called:
Correct Answer: B
1 kilocalorie is the heat needed to raise 1 kg of water by 1°C.
453. The heat gained or lost by a body can be calculated using:
Correct Answer: C
Heat depends on mass, specific heat, and temperature change.
454. If the mass of a body is doubled, its heat capacity becomes:
Correct Answer: B
Heat capacity C = m × c, so it increases with mass.
455. The specific heat of a substance is defined as the heat required to raise the temperature of:
Correct Answer: A
Specific heat is heat required for 1 kg mass for 1°C rise.
456. The specific heat capacity of water is high, so it is used as:
Correct Answer: D
Water absorbs more heat with less temperature rise, making it a good coolant.
457. The phenomenon of expansion of solids on heating is called:
Correct Answer: C
Solids increase in size due to thermal expansion when heated.
458. The coefficient of linear expansion is measured in:
Correct Answer: B
Expansion coefficient is defined per unit temperature change (K⁻¹).
459. The coefficient of areal expansion is approximately:
Correct Answer: A
Areal expansion coefficient is approximately twice linear coefficient.
460. The coefficient of volume expansion of a solid is approximately:
Correct Answer: D
Volume expansion coefficient is approximately 3 times linear coefficient.
461. Water shows anomalous expansion between:
Correct Answer: B
Water expands on cooling from 4°C to 0°C, showing anomalous expansion.
462. Water has maximum density at:
Correct Answer: C
Water has maximum density at 4°C.
463. Ice floats on water because:
Correct Answer: D
Ice has lower density, so it floats on water.
464. The best absorber of radiant heat is:
Correct Answer: B
Dull black absorbs maximum radiant heat.
465. The best reflector of radiant heat is:
Correct Answer: C
Shiny polished surfaces reflect radiant heat effectively.
466. The best emitter of radiant heat is:
Correct Answer: A
Dull black surfaces emit maximum heat radiation.
467. The device used to prevent heat transfer using vacuum is:
Correct Answer: D
Thermos flask uses vacuum to reduce conduction and convection.
468. Silver coating inside a thermos flask reduces heat loss by:
Correct Answer: B
Shiny coating reflects radiations, reducing heat transfer by radiation.
469. The process of heat transfer in which no medium is required is:
Correct Answer: C
Radiation can transfer heat even through vacuum.
470. The coefficient of expansion depends on:
Correct Answer: D
Expansion coefficient depends mainly on the material properties.
Heat MCQs (451–480) FAQs
1. What topics are covered in Heat MCQs (451–480)?
This set covers calorimetry formula (Q = m × c × ΔT), thermal expansion coefficients, and properties of radiation.
2. Are these Heat MCQs helpful for concept revision?
Yes, these questions help revise definitions, units, and key Heat chapter laws quickly.
3. Do these MCQs include explanations for answers?
Yes, every question includes the correct answer with a short explanation for better understanding.
4. How do Heat MCQs help students in exams?
Regular practice improves speed, reduces mistakes, and builds confidence in objective questions.
5. Which topics should be practiced after this MCQ set?
Students should revise latent heat, radiation properties, and thermal expansion relations for strong fundamentals.
This set covers calorimetry formula (Q = m × c × ΔT), thermal expansion coefficients, and properties of radiation.
2. Are these Heat MCQs helpful for concept revision?
Yes, these questions help revise definitions, units, and key Heat chapter laws quickly.
3. Do these MCQs include explanations for answers?
Yes, every question includes the correct answer with a short explanation for better understanding.
4. How do Heat MCQs help students in exams?
Regular practice improves speed, reduces mistakes, and builds confidence in objective questions.
5. Which topics should be practiced after this MCQ set?
Students should revise latent heat, radiation properties, and thermal expansion relations for strong fundamentals.
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