There are 4 questions and plzz tell reason for all question
1. The volume og 1.0g hydrogen at NTP is:
(1) 2.24 L (2) 22.4 L
(3) 1.12 L (4) 11.2 L

2. 11 grams of a gas occupy 5.6 L of volume at STP The gas is:
(1) NO (2) N2O4
(3) CO (4) CO2

3. At NTP , 5.6 L(liters) of gas weight 8g (grams). The vapour density of gas is:
(1) 32 (2) 40
(3) 16 (4) 8

4. The vapour densities of two gases are in ratio 1:3 . Their molecular masses are in ratio of:
(1) 1:3 (2) 1:2
(3) 2:3 (4) 3:1