Q221
Open questionWhich of the following produces more severe burns?
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Physics GK · all questionsHeat and Thermodynamics
Heat and Thermodynamics
practice.
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308
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Q222
Open questionCloudy nights are warmer compared to clear cloudless nights, because clouds
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Q223
Open questionOn adding common salt to water, the boiling point and freezing point of water will
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Q224
Open questionWhich one of the following instruments is used for measuring moisture content of air?
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Q225
Open questionWhich of the following processes will have the slowest speed for the same volume of a liquid?
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Q226
Open questionMatch the following.
| List-I | List-II |
| a. Evaporation | 1. Liquid into gas |
| b. Sublimation | 2. Liquid into solid |
| c. Freezing | 3. Solid into gas |
| d. Melting | 4. Solid into liquid |
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Q227
Open questionAssertion (A): A piece of copper and a piece of glass are heated to the same temperature. When touched, thereafter the copper piece appears hotter than the glass piece.
Reason (R): The desity of copper is more than that of glass.
Reason (R): The desity of copper is more than that of glass.
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Q228
Open questionA gap is left between two rails of a railway track to accommodate . . . . . . . . of the metal.
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Q229
Open questionThermostat . . . . . . . . is a mean of Keeping Stable.
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Q230
Open question. . . . . . . . are comparatively bad conductors of heat
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Q231
Open questionThe atmosphere is heated mainly by
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Q232
Open questionWhich of the following is correct?
Specific volume of water when heated at 0 Celsius
Specific volume of water when heated at 0 Celsius
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Q233
Open questionThe water from a hand pump is warm in winter because
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Q234
Open questionA hydrogen inflated polythene balloon is released from the surface of the Earth. As the balloon rises to an altitude up in the atmosphere, it will
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Q235
Open questionSuper cooling stands for cooling of a liquid
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Q236
Open questionConsider the following statements.
Assertion (A): Light coloured clothes are preferred in summer.
Reason(R): Light colours are poor absorbers of heat.
Select correct answer:
Assertion (A): Light coloured clothes are preferred in summer.
Reason(R): Light colours are poor absorbers of heat.
Select correct answer:
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Q237
Open questionBurns caused by steam are much severe than those caused by boiling water because
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Q238
Open questionWhich of the following represents a relation for heat lost = heat gained?
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Q239
Open questionIf thermal capacity of a body is expressed in terms of mass of water is called
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Q240
Open questionGreen house effect is the heating up of the Earth's atmosphere which is due to
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