MEDIUM
11th CBSE
IMPORTANT
Earn 100

A volume of hydrogen measures one cubic decimetre at 20°C and at a pressure of half an atmosphere. What will be its volume at 10°C and at 700 mm pressure?

Important Questions on States of Matter: Gases and Liquids

HARD
11th CBSE
IMPORTANT
300 litres of ammonia gas at 20°C and 20 atmosphere pressure are allowed to expand in a space of 600 litres capacity and to a pressure of one atmosphere. Calculate the drop in temperature.
HARD
11th CBSE
IMPORTANT
One litre flask containing vapours of methyl alcohol (Mol mass 32) at a pressure of 1 atm and a temperature 25°C was evacuated till the final pressure was 10-3 mm. How many molecules of methyl alcohol were left in the flask?
HARD
11th CBSE
IMPORTANT
28.32 litres of chlorine were liberated at normal conditions of temperature and pressure. Calculate the volume of the gas at 12°C and 780 mm pressure.
MEDIUM
11th CBSE
IMPORTANT
Temperature at the foot of a mountain is 30°C and pressure is 760 mm whereas at the top of the mountain these are 0°C and 710 mm. Compare the densities of the air at the foot and at the top of the mountain.
HARD
11th CBSE
IMPORTANT
Calculate the number of moles of hydrogen gas present in 500 cm3 of the gas taken at 300 K and 760 mm pressure. If this sample of hydrogen is found to have a mass equal to 4.09×10-2 g, calculate the molar mass of hydrogen.
MEDIUM
11th CBSE
IMPORTANT
2.802 g of N2 gas is kept in a litre flask at 0°C. Calculate the pressure exerted by the gas.
EASY
11th CBSE
IMPORTANT
Calculate the molar volume of a gas at STP.
EASY
11th CBSE
IMPORTANT
A 500 mL sample of a gas weighs 0.326 g at 100°C and 0.500 atm. What is the molecular mass of the gas?