The volume of a given mass of a gas at constant temperature and 10 atmospheric pressure is 10 litres. Its volume at 5 atmospheres will be :

1. 5 litres
2. 10 litres
3. 15 litres
4. 20 litres

STP is called standard temperature and pressure. The standard temperature and standard pressure respectively are :

1. 273 K and 760 mm
2. 0°C and 760 cm
3. 273°C and 1 atmosphere
4. 373 K and 76 cm

The term used for the graph of volume vs pressure for the verification of Boyle's law is :

P — Isobar

Q — Isotherm

R — Isotope

1. Only P
2. Only Q
3. Only R
4. Both P and Q

Assertion (A): Inflating a balloon seems to violate Boyle's law.

Reason (R): Boyle's law is valid for a fixed mass. Here, the mass of gas is changing.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.