Thermal Properties of Matter Questions and Answers Part-3

1. Mercury boils at 367°C. However, mercury thermometers are made such that they can measure temperature up to 500°C. This is done by
a) Maintaining vacuum above mercury column in the stem of the thermometer
b) Filling nitrogen gas at high pressure above the mercury column
c) Filling nitrogen gas at low pressure above the mercury level
d) Filling oxygen gas at high pressure above the mercury column

Answer: b
Explanation: Filling nitrogen gas at high pressure above the mercury column

2. A device used to measure very high temperature is
a) Pyrometer
b) Thermometer
c) Bolometer
d) Calorimeter

Answer: a
Explanation: Pyrometer

3. The absolute zero temperature in Fahrenheit scale is
a) – 273°F
b) – 32°F
c) – 460°F
d) – 132°F

Answer: c
Explanation: – 460°F

4.A constant pressure air thermometer gave a reading of 47.5 units of volume when immersed in ice cold water, and 67 units in a boiling liquids. The boiling point of the liquid will be
a) 135°C
b) 125°C
c) 112°C
d) 100°C

Answer: c

5. If temperature of an object is 140°F, then its temperature in centigrade is
a) 105°C
b) 32°C
c) 140°C
d) 60°C

Answer: d

6. Of the following thermometers, the one which can be used for measuring a rapidly changing temperature is a
a) Thermocouple thermometer
b) Gas thermometer
c) Maximum resistance thermometer
d) Vapour pressure thermometer

Answer: a
Explanation: Rapidly changing temperature is measured by thermocouple thermometers

7. On centigrade scale the temperature of a body increases by 30 degrees. The increase in temperature on Fahrenheit scale is
a) 50°
b) 40°
c) 30°
d) 54°

Answer: d

8. The correct value of 0°C on Kelvin scale will be
a) 273.15 K
b) 273.00 K
c) 273.05 K
d) 273.63 K

Answer: a
Explanation: 273.15 K

9. When a copper ball is heated, the largest percentage increase will occur in its
a) Diameter
b) Area
c) Volume
d) Density

Answer: c

10. A vertical column 50 cm long at 50°C balances another column of same liquid 60 cm long at 100°C. The coefficient of absolute expansion of the liquid is
a) 0.005/°C
b) 0.0005/°C
c) 0.002/°C
d) 0.0002/°C

Answer: a