MCQ Questions

Question No. 1

The highest recorded temperature in Nigeria occurred in the city of Sokoto, where the temperature reached 47.2 °C. What is this temperature on the Kelvin scale?

Answer :

Question No. 2

Give two advantages and two disadvantages of the mercury thermometer compared to the alcohol thermometer.

Answer :

Question No. 3

Give one advantage and one disadvantage of the resistance thermometer compared to the thermocouple.

Answer :

Question No. 4

Give reasons for the following features of a clinical thermometer:

Answer :

a) The stem is long and cylindrical and not spherical.

b) The bulb is made of thin glass.

c) The capillary has a very small cross-sectional area.

d) There is a constriction on the capillary.

Question No. 5

Name six properties that a liquid must have in order for it to be used as a thermometric liquid in a liquid-in-glass thermometer. Give a reason for choosing each of the properties.

Answer :

Question No. 6

Answer the following questions:

Answer :

a) Give one advantage and one disadvantage of using a gas thermometer.

b) A gas thermometer reads 320 mm Hg when placed in a beaker of ice and water, and 332 mm Hg at 27 °C. What will the pressure reading be when placed in a mixture of steam and water at 760 mm Hg?

Question No. 7

A mercury-in-glass thermometer made in the school laboratory is marked 30 mm in ice-water and 110 mm in steam-water at 760 mm Hg. What will be the reading on the thermometer at 30 °C?

Answer :

Question No. 8

A resistance thermometer has a resistance of 20 Ω at the lower fixed point and 55 Ω at the upper fixed point. What will be the temperature reading when its resistance is 67 Ω?

Answer :

Question No. 9

The diagram below shows a maximum and minimum thermometer.

Answer :

a) Name the liquids A and B.

b) What is the room temperature being recorded?

c) What are the maximum and minimum temperatures recorded for the day?

Question No. 10

Temperature is a measure of the:

Answer :

heat content of the molecules

amount of work done on the molecules

amount of expansion of the molecules

average translational kinetic energy of the molecules

Question No. 11

The lower and upper fixed points used in calibrating a thermometer respectively are

Answer :

0 K and 100 K

273 °C and 100 °C

273 K and 373 K

0 K and 373 K

Question No. 12

A good thermometer must have the following three properties: (i) very accurate measurements (ii) respond quickly to temperature change (iii) wide range of measurements. Which are satisfied by a resistance thermometer?

Answer :

(i) only

(i) and (ii) only

(i) and (iii) only

(i), (ii) and (iii)

Question No. 13

The pressure reading on a gas thermometer is 220 mm Hg at 0 °C and 310 mm Hg at 100 °C. What is the temperature when the pressure reads 200 mm Hg?

Answer :

−22.2 °C

22.2 °C

45 °C

−0.22 °C

Question No. 14

Which of the following thermometers can be used to measure temperatures ranging from –20 °C to 200 °C? (i) mercury thermometer (ii) alcohol thermometer (iii) maximum and minimum thermometer

Answer :

(i), (ii) and (iii)

(i) only

(i) and (ii) only

(i) and (iii) only

Question No. 15

The thermometer most suitable to measure the temperature of molten aluminium (660 °C) is a:

Answer :

mercury thermometer

gas thermometer

resistance thermometer

thermocouple

Question No. 16

Mercury and not water is used in thermometers because: (i) mercury is a good conductor of heat (ii) mercury has a high expansivity (iii) mercury has a high density

Answer :

(i) only

(i) and (ii) only

(i) and (iii) only

(i), (ii) and (iii)

Question No. 17

Which one of the following statements about temperature scales is INCORRECT?

Answer :

The lowest possible temperature is 0 K.

A temperature change of 10 °C is the same as a change of 10 K.

Absolute temperature is measured in kelvins.

A temperature of 155 °C is the same as 155 K.

Question No. 18

When the temperature of a gas in a fixed container is increased:

Answer :

The density of the gas increases.

The volume of the gas increases.

The number of collisions of molecules with the walls increases.

The time between collisions increases.

Question No. 19

The pressure of a gas in a cylinder at 20 °C is p. If the temperature increases to 30 °C, the new pressure will be:

Answer :

1.5 p

10 p

1.03 p

0.67 p

Chapter

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