**A sample of gas occupies 10 L under a pressure of 1 atm. What will be its volume if the pressure is increased to 2 atm? Assuming that temperature of the gas sample does not change-**

(i) 2 L

*(ii) 5 L*

(iii) 10 L

(iv) 1 L

**A gas at a pressure of 5 atm is heated from 0° to 546°C and simultaneously compressed to 1/3rd of its original volume. Hence the final pressure is-**

(i) 10 atm

*(ii) 45 atm*

(iii) 30 atm

(iv) 5 a

**How much should the pressure be increased in order to decrease the volume of a gas by 5% at a constant temperature?**

(i) 5%

*(ii) 5.26%*

(iii) 10%

(iv) 4.26%

**When the temperature is raised through 1°C the volume is increased by 1/273th times of the original volume. This is-**

(i) Boyle’s Law

*(ii) Charles’ Law*

(iii) Avogadro Law

(iv) Graham’s Law

**To what temperature must a neon gas sample be heated to double its pressure if the initial volume of gas at 75°C is decreased by 15.0% ?**

*(i) 591.6 K*

(ii) 492.8 K

(iii) 592 K

(iv) 642 K

**When a gas filled in a closed vessel is heated through 1°C, its pressure is increased by 0.4%. The initial temperature of the gas was –**

*(i) 250 K*

(ii) 2500 K

(iii) 250°C

(iv) 25°C

**One gram molecules of a gas at N.T.P. occupy 22.4 liters. This fact was derived from –**

(i) Dalton’s theory

*(ii) Avogadro’s hypothesis*

(iii) Berzelius hypothesis

(iv) Law of gaseous volume

**A sample of gas at 1.2 atm and 27°C is heated at constant pressure to 57°C. Its final volume is found to be 4.75 litres. What was its original volume ?**

*(i) 4.32 litres*

(ii) 5.02 litres

(iii) 4.22 litres

(iv) None of these

**If the density of a certain gas at 30°C and 768 torr is 1.35 kg/m3 its density at STP would be**

*(i) 1.49 kg/m³*

(ii) 1.58 kg/m³

(iii) 1.25 kg/m³

(iv) 1.4 kg/m³

**A vessel has 6 g of oxygen at a pressure P and temperature 400 K. A small hole is made in it so that O2 leaks out. How much O2 leaks out if the pressure is P/2 and temperature 300 K ?**

(i) 5 g

(ii) 4 g

*(iii) 2 g*

(iv) 3 g