MCQ Sangam Age SET 9

1. Among the following sentences the one that is false about gases is

Gases have low densities

The gases mix evenly and uniformly without any mechanical aid.

The pressure exerted by gases on the walls of the container is equal in all the directions.

Gases are highly compressible because their molecules are very tightly packed.

Your comments:

Question 1 of 20

2. A cylinder of V litre capacity contains ammonia gas. This cylinder is inverted over another vessel of V litre capacity containing hydrogen chloride at the same temperature and pressure. The pressure in the cylinder after sometime will

Remain same

Become 3/2 of the original pressure

Double

Drop

Your comments:

Question 2 of 20

3. The number of elements that exists in gaseous state under normal atmospheric conditions is

Your comments:

Question 3 of 20

4. The relation between Celsius scale and Fahrenheit scale of measuring temperature is

°C = ½ (°F- 32)

°C = 5/9 (°F – 32)

°C = 3/2 (°F-32)

°C = 4/5 (°F-32)

Your comments:

Question 4 of 20

5. Which one will have higher value of enthalpy of vaporization:

Liquid having weak hydrogen bonds

Liquid having strong attractive forces

Liquid having no attractive forces

Liquid having weak attractive forces

Your comments:

Question 5 of 20

6. The zero point temperature is:

-273.15°C

0°C

273 K

25°C

Your comments:

Question 6 of 20

7. Choose the characteristic property of gases from the following

Gases have high density

Gases are not compressible

Gases are not at all rigid

Gases have particles in fixed positions

Your comments:

Question 7 of 20

8. Choose the one which is not a characteristic property of gases:

Gases have maximum thermal energy

The gases mix evenly and uniformly without any mechanical aid

Gases are rigid

Gases are compressible

Your comments:

Question 8 of 20

9. Which of the following sublimes at ordinary temperature:

Potassium

Camphor

Sulphur

Sodium chloride

Your comments:

Question 9 of 20

10. Thermal energy is responsible for:

Charges on the particles

Polarisability of particles

Density of the particles

Movement of particles

Your comments:

Question 10 of 20

11. Thermal energy is directly proportional to:

Temperature of the surrounding

Temperature of the substance

Density

Pressure

Your comments:

Question 11 of 20

12. The conditions necessary for a gas to liquefy are

Compression

Decrease in the temperature

Increase in temperature

Both decreasing temperature and compression

Your comments:

Question 12 of 20

13. The temperature in Celsius scale can be converted into Kelvin scale

By dividing it with 273

By subtracting 273.15 from it

By multiplying it with 273

By adding 273.15 to it

Your comments:

Question 13 of 20

14. What happens to density of liquids on increasing temperatures:

Increases

Remains constant

Decreases

Has no effect

Your comments:

Question 14 of 20

15. What happens to boiling point of a liquid when pressure is increased:

Remains constant

Increases

Decreases

Has no effect

Your comments:

Question 15 of 20

16. Sublimation involves the direct state change from:

Solid to gas

Solid to liquid

Gas to liquid

Liquid to solid

Your comments:

Question 16 of 20

17. Standard enthalpy of vaporization is taken at:

273 K

0°C

25°C

298 K

Your comments:

Question 17 of 20

18. The standard boiling point of the liquid is

The boiling point at 2 atm pressure.

The boiling point at 1 atm pressure.

The temperature at which a liquid converts to gas.

The boiling point at 1 bar pressure.

Your comments:

Question 18 of 20

19. Normal boiling point is

The boiling point at 1 bar pressure.

The boiling point at 1 atm pressure.

The boiling point at 2 bar pressure.

The temperature at which a liquid converts to gas.

Your comments:

Question 19 of 20

20. In the process of conversion of a solid to liquid the average distance between the molecules is

10^-8 cm

beyond 10^-7 cm

beyond 10^-6 cm

10^-2 cm

Your comments:

Question 20 of 20

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