Heat And Thermodynamics — Part 2 MCQs with Explanations

The steam has latent heat is the correct answer to “The hand bums more by steam comparatively to boiling water, because”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

No change will happen is the correct answer to “What changes will happen to a bowl of ice and water kept at exactly 0°C”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

Electron is the correct answer to “Due to presence of . . . . . . . . in an object, it conducts electricity.”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

does not reflect any colour is the correct answer to “The blackboard seems black because it”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

radiation is the correct answer to “The silvering in thermo flask is done to avoid heat transfer by”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

Their temperatures is the correct answer to “The direction of heat flow between two body depends on which of the following”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

all the above is the correct answer to “The expected quality of a refrigerant is-”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

32°F is the correct answer to “What is the freezing point of water-”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

98.6°F is the correct answer to “What is the value of the temperature which is considered normal in human body-”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

First decreases and then increases is the correct answer to “When water is heated from 0°C to 10°C. It's volume”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

4°C is the correct answer to “The safest temperature for keeping food fresh in a refrigerator is”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

Boiling point is increased and freezing point is decreased is the correct answer to “Which one of the following changes occurs when salt is added into the water”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

low humidity is the correct answer to “Xeric condition refers to”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

low temperatures is the correct answer to “Cryogenics is a science dealing with”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

4 is the correct answer to “Surface water of a lake is about to freeze. What will be the temperature (in °C) of water at the bottom of the lake”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

Only 1 is the correct answer to “Which of the following statement(s) about specific heat of a body is/are correct? 1. It depends upon mass and shape of the body. 2. It is independent of mass and shape of the body. 3. It depends only upon the temperature of the body.”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

Clouds reflect back the Earth's radiation is the correct answer to “Why are dewdrops not formed on a cloudy night”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

Both (A) and (R) are true, but (R) is not the correct explanation of (A) is the correct answer to “Assertion (A): The handle of pressure cooker is made up of Abonite. Reason (R): Abonite is a hard material.”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

prevent the heat of the body from escaping is the correct answer to “The woollen clothes keep us warm in winter because they”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

To maintain the temperature is the correct answer to “What is the use of thermostat”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

Will decrease is the correct answer to “Thermal conductivity of a solid metal with increasing temperature-”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

radiation is the correct answer to “Clear nights are colder than cloudy nights because of . . . . . . . .”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

advection is the correct answer to “Heat transfer horizontally within the atmosphere is called”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

Humidity inside the fridge is low and extra moisture is absorbed is the correct answer to “When soggy biscuits are kept inside the fridge for sometime they become crisp because”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

Evaporation is the correct answer to “Which of the following principles does the refrigerator work on”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

At a temperature of -273 Celsius is the correct answer to “On which we gets the absolute zero pressure”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

isobaic process is the correct answer to “Blowing air with open pipe is an example of”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

Both the statements are individually true and statement II is the correct expalanation of statement I is the correct answer to “Statement I While putting clothes for drying up, we spread them out. Statement II The rate of evaporation increases with an increase in surface area.”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

does not change is the correct answer to “During the melting of solid, its temperature”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

latent heat of vaporisation is the correct answer to “The amount of heat required to change a liquid to gaseous state without any change in temperature is known as”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

Must subtract 273 is the correct answer to “To convert the temperature taken on the Kelvin scale to the Celsius scale-”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

Because of low atmospheric pressure is the correct answer to “Why boiling point of water decreases at high altitudes”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

alcohol thermometer is the correct answer to “The lowest temperature is recorded by”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

Temperature of boiling water increases due to high pressure is the correct answer to “Pressure cooker cooks food in lesser time because”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

Joule's law is the correct answer to “. . . . . . . . is not related to gases.”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

difference of the temperature of the body and the surrounding is the correct answer to “According to Newton's Law of Cooling the rate of cooling of a body is proportional to the”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

Increases is the correct answer to “When a glass rod is placed in steam, its length increases but its width”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

98.6°F is the correct answer to “The normal temperature of a human body is . . . . . . . .”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

Both (A) and (R) are true and (R) is the correct explanation of (A) is the correct answer to “Assertion (A): A piece of ice added to the drink, cools it. Reason (R): Ice takes latent heat from the drink for melting resulting in the cooling of the drink. Select the correct answer:”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.

Both (A) and (R) is true and (R) is the correct explanation of (A) is the correct answer to “Below is a statement (A) and a reason (R)- (A): Left a small gap between tracks (R): Iron spread in summer.”. This question is standard in competitive examination syllabi for Heat And Thermodynamics.