The volume occupied by 4.75 g of acetylene gas at 50 °C and 740 mmHg pressure is-  

[Given R = 0.0826 L atm K^–1 mol^–1]

1. 6 L

2. 5 L

3. 8 L

4. 10 L

3.12 g of oxygen is adsorbed on 1.2 g of platinum metal. The volume of oxygen adsorbed per gram of the

adsorbent at 1 atm and 300 K in L is:

[R = 0.0821 L atm K^–1 mol^–1]

1. 4 L

2. 3 L

3. 1 L

4. 2 L

Among the following, the graph not correctly representing an ideal gas is:

d = Density , P = Pressure, T = Temperature 

1.  II
2.  III
3.  I
4.  IV

The volume of hydrogen gas at 273 K and 1 atm pressure that will be consumed in obtaining 21.6 g of elemental boron ( atomic mass = 10.8) from the reduction of boron trichloride by hydrogen is-

1. 89.6 L 

2. 67.2 L 

3. 44.8 L 

4. 22.4 L 

If 10⁻⁴ dm³ of water is introduced into a 1.0 dm³ flask at 300 K, then the total number of moles of water in the vapour phase (equilibrium is established) are-

(Given: Vapour pressure of H₂O at 300 K is 3170 Pa; R = 0.0821 atm L K⁻¹ mol⁻¹; 1 Pa = 9.9 × 10^-6 atm )

1. 1.26 x 10⁻³ mol 

2. 5.56 x 10⁻³ mol 

3. 1.53 x10⁻² mol 

4. 4346 x 10-² mol