Heat MCQs (91–120) with Answers and Explanations are designed for quick revision of Heat and Thermodynamics basics.
This practice set includes calorimetry, specific heat, latent heat, thermal conductivity, and real-life heat transfer applications.
91. The device used to measure heat energy is:
Correct Answer: C
A calorimeter is used to measure heat changes in physical processes.
92. Calorimetry is based on the principle of:
Correct Answer: B
In calorimetry, heat given by hot body equals heat taken by cold body.
93. The quantity of heat needed to raise 1 kg water by 1°C is called:
Correct Answer: A
1 calorie raises the temperature of 1 gram water by 1°C (basic definition).
94. The specific heat capacity of a substance depends on:
Correct Answer: D
Specific heat is a material property depending on the substance.
95. Which has the highest specific heat capacity?
Correct Answer: B
Water has a high specific heat, so it heats up slowly compared to metals.
96. The heat required to change state without temperature change is:
Correct Answer: C
Latent heat changes the state without raising temperature.
97. The heat required to convert solid into liquid is called:
Correct Answer: A
Fusion is the change of state from solid to liquid.
98. The heat required to convert liquid into gas is called:
Correct Answer: B
Vaporization heat changes liquid to gas at constant temperature.
99. The instrument that measures very low temperatures is:
Correct Answer: C
Gas thermometers can measure very low temperatures accurately.
100. A good conductor of heat is generally:
Correct Answer: D
Metals conduct heat well due to free electrons.
101. The process of heat transfer through a solid without movement of molecules is:
Correct Answer: A
Conduction transfers heat without bulk movement of matter.
102. Convection occurs mainly in:
Correct Answer: C
Convection happens due to the motion of fluids (liquids and gases).
103. The best absorber of radiant heat is:
Correct Answer: B
Black surfaces absorb the maximum heat radiation.
104. The best reflector of radiant heat is:
Correct Answer: A
Shiny polished surfaces reflect radiant heat effectively.
105. The heat transfer that does not require any material medium is:
Correct Answer: B
Radiation can transfer heat through vacuum.
106. The heat transfer in a vacuum takes place by:
Correct Answer: C
Radiation is possible without a medium, unlike conduction and convection.
107. The measure of average kinetic energy of molecules is:
Correct Answer: D
Temperature indicates the average kinetic energy of molecules.
108. The temperature at which a solid changes into liquid is:
Correct Answer: A
Melting point is the temperature of solid-to-liquid change.
109. The temperature at which liquid changes into gas is:
Correct Answer: B
Boiling point is the temperature where liquid turns into gas.
110. The SI unit of temperature is:
Correct Answer: C
Kelvin (K) is the SI unit of temperature.
111. Absolute zero on Kelvin scale is:
Correct Answer: C
Absolute zero is the lowest possible temperature (0 K).
112. A thermos flask minimizes heat loss by:
Correct Answer: A
Vacuum and silver coating reduce all three heat transfer modes.
113. The phenomenon responsible for sea breeze is:
Correct Answer: B
Sea breeze occurs due to convection currents from unequal heating.
114. The phenomenon responsible for land breeze is:
Correct Answer: B
Land breeze also happens due to convection currents in air.
115. The process of heat transfer due to actual movement of particles is:
Correct Answer: C
Convection transfers heat by movement of liquid or gas particles.
116. The heat transfer from Sun to Earth is mainly by:
Correct Answer: B
Heat from the Sun travels through space by radiation.
117. A dull black surface is a good:
Correct Answer: D
Dull black surfaces absorb and emit heat radiation efficiently.
118. A shiny polished surface is a good:
Correct Answer: A
Shiny surfaces reflect radiant heat and reduce heat loss.
119. 100°C is equal to:
Correct Answer: B
Kelvin = Celsius + 273, so 100°C = 373 K.
120. 0°C is equal to:
Correct Answer: A
0°C corresponds to 273 K on Kelvin scale.
Heat MCQs (91–120) FAQs
1. What topics are covered in Heat MCQs (91–120)?
This set covers calorimetry, specific heat capacity, latent heat, temperature scales, and heat transfer methods.
2. Are these Heat MCQs suitable for class 8, 9, and 10 students?
Yes, these questions are helpful for middle and secondary school Heat chapter preparation.
3. Do these MCQs include explanations for answers?
Yes, every question has a short explanation to improve concept understanding and revision.
4. How often should students practice Heat MCQs?
Regular practice improves accuracy, speed, and confidence in objective exam questions.
5. Can these Heat MCQs help in competitive exams?
Yes, the MCQs strengthen basics required for many competitive exam science sections.
This set covers calorimetry, specific heat capacity, latent heat, temperature scales, and heat transfer methods.
2. Are these Heat MCQs suitable for class 8, 9, and 10 students?
Yes, these questions are helpful for middle and secondary school Heat chapter preparation.
3. Do these MCQs include explanations for answers?
Yes, every question has a short explanation to improve concept understanding and revision.
4. How often should students practice Heat MCQs?
Regular practice improves accuracy, speed, and confidence in objective exam questions.
5. Can these Heat MCQs help in competitive exams?
Yes, the MCQs strengthen basics required for many competitive exam science sections.
.png)
Post a Comment