Name the gas used in :
filling balloons

Name the gas used in : light bulbs

Name the gas used in : bright coloured advertising light works

Explain why: Helium is used for filling weather balloons.

A steel cylinder of intemal volume 20 litres is filled with hydrogen at 29 atmospheric pressure. If hydrogen is used to fill a balloon at 1.25 atmospheric pressure at the same temperature, what volume will the gas occupy?

Internal volume of steel cylinder was 25 litres and filled with hydrogen gas at 30 atmospheric pressure. What will be the volume occupied by hydrogen gas if it is filled in a balloon at atmospheric pressure of 1.25 atm. pressure. At the same temperature?

Helium is preferred to hydrogen for filling balloons because it is :

A tank used for filling helium balloons has a volume of 0 .3 m^3 and contains (2.0) mol of helium gas at 20 .0^@ C . Assuming that the helium behaves like an ideal gas. (a) What is the total translational kinetic energy of the molecules of the gas ? (b) What is the average kinetic energy per molecule ?

Helium is not used to fill gas balloons. True/False

Name the substance used for drying ammonia gas.

(i)Name the industrial method for the production of hydrogen gas. (ii)Name the catalyst used in the above process.