Heat MCQs (331–360) with Answers and Explanations help students practice important objective questions on thermal expansion, calorimetry, and heat transfer laws.
This MCQ set is useful for school and competitive exams to revise Heat chapter concepts with quick explanations for better understanding.
331. The quantity of heat required to raise the temperature of 1 kg of water by 1°C is:
Correct Answer: C
1 kilocalorie is the heat needed to raise 1 kg water by 1°C.
332. The heat capacity of a body depends on:
Correct Answer: D
Heat capacity depends on m and c (C = m × c).
333. If the specific heat of a substance is high, it means:
Correct Answer: B
Higher specific heat means more heat is needed to raise temperature.
334. The unit of heat capacity is:
Correct Answer: A
Heat capacity is energy required per unit temperature change (J/K).
335. Which of the following is an example of conduction?
Correct Answer: C
Heat travels through a solid rod by conduction.
336. The rate of heat conduction increases when:
Correct Answer: D
Larger temperature difference causes faster conduction.
337. In convection, heat is transferred by:
Correct Answer: B
Convection occurs due to bulk motion of liquid or gas particles.
338. The air near the heater rises upward due to:
Correct Answer: A
Hot air expands, becomes less dense, and rises.
339. Which of the following is the correct relation between coefficient of areal (γ) and linear (α) expansion?
Correct Answer: C
Areal expansion coefficient is approximately twice the linear coefficient.
340. Which of the following is true about thermal expansion?
Correct Answer: D
Gases have maximum expansion for a given temperature rise.
341. The boiling point of water decreases when:
Correct Answer: A
Lower pressure reduces boiling point (e.g., at high altitudes).
342. A pressure cooker cooks food faster because it:
Correct Answer: B
Higher pressure raises boiling point and speeds up cooking.
343. The temperature remains constant during boiling because:
Correct Answer: D
Supplied heat is used to change state, not raise temperature.
344. The temperature remains constant during melting because:
Correct Answer: B
Heat energy breaks bonds during melting without raising temperature.
345. The SI unit of coefficient of linear expansion is:
Correct Answer: C
Expansion coefficient is measured per unit temperature change (K⁻¹).
346. Which of the following is used to reduce heat loss by conduction?
Correct Answer: D
Thermocol is a poor conductor and works as an insulator.
347. Woollen clothes keep us warm because:
Correct Answer: A
Wool traps air and reduces heat loss from the body.
348. The device used to measure temperature is:
Correct Answer: B
Thermometer is used to measure temperature.
349. The SI unit of temperature is:
Correct Answer: D
Kelvin (K) is the SI unit of temperature.
350. The relation between Fahrenheit (F) and Celsius (C) is:
Correct Answer: C
Fahrenheit and Celsius are related by F = (9/5)C + 32.
351. The value of 0°C in Kelvin scale is:
Correct Answer: B
0°C corresponds to 273 K approximately.
352. 100°C is equal to:
Correct Answer: D
100°C corresponds to about 373 K.
353. The SI unit of thermal conductivity is:
Correct Answer: A
Thermal conductivity is measured in W/mK.
354. The principle used in a thermometer is:
Correct Answer: B
Thermometers work on thermal expansion of liquids like mercury.
355. Thermal expansion is used in:
Correct Answer: D
Thermostats use expansion of different metals in bimetallic strips.
356. Which of the following expands the most on heating?
Correct Answer: C
Gases expand the most compared to solids and liquids.
357. The coefficient of volume expansion is approximately:
Correct Answer: A
For isotropic solids, volume expansion coefficient β ≈ 3α.
358. Water shows anomalous expansion between:
Correct Answer: B
Water expands on cooling from 4°C to 0°C, showing anomalous behavior.
359. Ice floats on water because:
Correct Answer: C
Ice has lower density, so it floats on water.
360. The correct statement is:
Correct Answer: D
Heat flows because of temperature difference, not because it is temperature.
Heat MCQs (331–360) FAQs
1. What topics are covered in Heat MCQs (331–360)?
This set includes heat capacity, specific heat, conduction, convection, radiation, thermal expansion, and temperature conversions.
2. Are these Heat MCQs useful for board exams and competitive exams?
Yes, these questions help in objective practice and quick revision for multiple exams.
3. Do these Heat MCQs provide answers and explanations?
Yes, every question includes the correct answer with a short explanation for clarity.
4. How do these Heat MCQs improve student performance?
Practicing MCQs improves speed, accuracy, and understanding of fundamental concepts.
5. How should students revise the Heat chapter using MCQs?
Solve the set, review explanations, and repeat practice regularly for better retention.
This set includes heat capacity, specific heat, conduction, convection, radiation, thermal expansion, and temperature conversions.
2. Are these Heat MCQs useful for board exams and competitive exams?
Yes, these questions help in objective practice and quick revision for multiple exams.
3. Do these Heat MCQs provide answers and explanations?
Yes, every question includes the correct answer with a short explanation for clarity.
4. How do these Heat MCQs improve student performance?
Practicing MCQs improves speed, accuracy, and understanding of fundamental concepts.
5. How should students revise the Heat chapter using MCQs?
Solve the set, review explanations, and repeat practice regularly for better retention.
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