$2500{\mathrm{cm}}^3$ of hydrogen is taken at $\mathrm{S}.\mathrm{T}.\mathrm{P}.$ The pressure of this gas is further increased by two and a half times (temperature remaining Constant). What volume will hydrogen occupy now?

A given amount of gas A is confined in a chamber is immersed in a bath of melting ice, the pressure of the gas is $100 \mathrm{cm} \mathrm{Hg}$. 

(a) What is the temperature, when the pressure is $10 \mathrm{cm} \mathrm{Hg}$?

(b) What will be the pressure, when the chamber is brought to $100\circ \mathrm{C}$?

A gas is to be filled from a tank of capacity 10,000 litres into cylinders each having capacity of 10 litres. The condition of the gas in the tank is as follows :

(a) pressure inside the tank is 800 mm of Hg.
When the cylinder is filled, the pressure gauge reads 400 mm of Hg and the temperature is 0∘C. Find the number of cylinders required to fill the gas.

A gas is to be filled from a tank of capacity $10,000$ litres into cylinders each having capacity of 10 litres. The condition of the gas in the tank is as follows :

(b) temperature inside the tank is$-3°\mathrm{C}$.
When the cylinder is filled, the pressure gauge reads $400 \mathrm{mm}$ of Hg and the temperature is $0°\mathrm{C}$. Find the number of cylinders required to fill the gas.

Which will have a greater volume when the following gases are compared at S.T.P?

$\left(\mathrm{a}\right)$ $1.2 \mathrm{l} {\mathrm{N}}_2 \mathrm{at} 25°\mathrm{C} \mathrm{and} 748 \mathrm{mm} \mathrm{Hg}$