A gas such as carbon monoxide would be most likely to obey the ideal gas law at-

1. High temperature and low pressure

2. Low temperature and high pressure

3. High temperature and high pressure

4. Low temperature and low pressure

Equal masses of H₂, O₂ and methane have been taken in a container of volume V at temperature 27°C in identical conditions. The ratio of the volumes of gases H₂: O₂ : CH₄ would be-

1. 8:16:1

2. 16:8:1

3. 16:1:2

4. 8:1:2

Maximum deviation from ideal gas is shown by-

1. H_2(g)   

2. N_2(g)

3. CH_4(g)

4. NH_3(g)

With 100% increase in temperature, the average velocity of a gaseous molecule increases by -

1. 2.8 times

2. 4.0 times

3. 1.4 times

4. 2.0 times

What volume of oxygen gas (O₂) measured at 0°C and 1 atm, is needed to burn completely 1 L of propane gas (C₃H₈) measured under the same conditions?

(1) 7L

(2) 6L

(3) 5L

(4) 10L

If van der Waals constant "a" for NH₃, H₂ and CO₂ are respectively 4.17, 0.244, 1.36 and 3.59, then which one of the following gases is most easily liquefied?

$1.$ ${\mathrm{NH}}_3$
$2.$ ${\mathrm{H}}_2$
$3.$ ${\mathrm{O}}_2$
$4.$ ${\mathrm{CO}}_2$