Thermal Properties of Matter: Heat transfer, Calorimetry, and States

In this quiz, you will find questions related to the thermal properties of matter which include heat transfer, calorimetry, states, etc.

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An aluminium piece and a wooden piece have been left in a room for a few hours. When you go and touch them the aluminium seems colder than wood. Select the correct option. Assume room temperature to be 25°.

Both have the same temperature greater than 25° Aluminium has a greater temperature than wooden piece Aluminium has a lower temperature than wooden piece Both have the same temperature equal to 25°

An ice cube is kept on the surface of an aluminium block and another ice cube on the surface of a plastic block. Both blocks have the same temperature. Select the correct statement.

Ice will melt faster on the aluminium block Ice will melt faster on the plastic block Ice will melt equally fast on both the blocks Ice will not melt on the plastic block

Boyle’s and Charle’s law are obeyed by low density gases only. True or False?

True False

When an object is heated its temperature definitely increases?

True False

A black body at hot temperature at 227°C radiates heat at a rate of 5 cal/cm²s. at a temperature of 727°C the rate of heat radiated per unit area will be

50 cal/cm²s 250 cal/cm²s 80 cal/cm²s 100 cal/cm²s

A body cools from 50°C to 46°C in 5 minutes and to 40°C in the next 10 minutes. The surrounding temperature is

30°C 28°C 36°C 32°C

For which of the following process, the thermal conduction is maximum?

Combustion Radiation Convection Conduction

A bucket full of hot water is kept in a room and it cools from 75°C to 70°C in t1 minutes from 70°C to 65°C in t2 minutes and from 65°C to 60°C in t3 minutes; then

t1 – t2 = t3 t1 < t2 < t3 t1 > t2 > t3 t1 < t2 > t3

The good absorber of heat are

Non-emitter Poor-emitter Good-emitter Highly polished

The reading of Centigrade thermometer coincides with that of Fahrenheit thermometer in a liquid. The temperature of the liquid is

40°C

100°C

313°C

0ºC

Expansion during heating

Generally decreases the density of a material

None of these

Increases the weight of a material

Occurs only in solids

Which of the following will expand the most for same rise in temperature?

Aluminium

Wood

Glass

All will expand same

An iron tyre is to be fitted on to a wooden wheel 1m in diameter. The diameter of tyre is 6 mm smaller than that of wheel. The tyre should be heated so that its temperature increases by a minimum of (the coefficient of cubical expansion of iron is 3.6 × 10–5/°C)

500°C

334°C

1000°C

167°C

A metal sheet with a circular hole is heated. The hole

Gets larger

Gets deformed

Gets smaller

None of these

Boyle’s law and Charle’s law together form which law?

PV/T = constant

PV^2/T = constant