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CBSE 11th Standard Physics Subject Thermal Properties of Matter HOT Questions 1 Mark Questions With Solution 2021

Published on: 29/05/2021

QB365 Provides the HOT Question Papers for Class 11 Physics, and also provide the detail solution for each and every HOT Questions. HOT Questions will help to get more idea about question pattern in every exams and also will help to get more marks in Exams

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Std: 11th Standard CBSE - Physics

chapter: - HOT Questions

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Questions:

Generic 2

5 x 2 = 10

Which object will cool faster when kept in open air, the one at 300 \(^{0}\) C or the one of 100 \(^{0}\)C? Why?

Calorimeters are made of metals not glass. Why?

A tightened glass stopper can be taken out easily by pouring hot water around the neck of the bottle. Why?

Is it possible to convert water into vapour form without increasing its temperature, if temperature and pressure of water are \(30^{ 0 }\) C and 1 atm respectively?

When we step barefoot into an office with a marble floor, we feel cold. Why?

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Answers Key:

Generic 2

5 x 2 = 10

The object at 300^oC will cool faster than the object at 100^oC. This is in accordance with Newton’s law of cooling. As we know, rate cooling of an object α temperature between the object and its surroundings.

This is because metals are good conductors of heat and have low specific heat capacity.

The neck expands but not the stopper due to poor conductivity of glass. Thus, the stopper can be taken out easily.

yes, water at 30^oC can be converted into vapour by reducing its pressure until it equals to the vapour pressure of water at 30^oC.

This is because marble is a better conductor of heat than concrete. When we walk barefooted on a marble floor, heat flows our body through the feet and we feel cold.