Question

Question 1. Write two uses of hydrogen gas

Question 2. Describe briefly with equations the Bosch process for the large scale production of hydrogen gas.

Question 3. State why hydrogen is not prepared in the laboratory by the action of sodium with cold water.​

Answer 1

1. Hydrogen gas is used as a fuel in some cars
2. it is used as a fuel for cooking because of its hihh calorific value

Answer 2

Explanation:

1. Hydrogen gas uses:-

(a) Hydrogen is used in the synthesis of ammonia and the manufacture of nitrogenous fertilizers.

(b) Hydrogenation of unsaturated vegetable oils for manufacturing vanaspati fat. It is used in the manufacture of many organic compounds, for example, methanol.

2. Bosch process is the process used to prepare di-hydrogen commercially.

In this process water gas (CO + H2, prepared from coal and water at 1270 K) is mixed with two times its volume of steam passed over catalyst Fe2O3, in the presence of promoter Cr2O3 or ThO2 at 773 K giving products CO2 and H2.

CO2 is dissolved in water under pressure (20 to 25 atm) and is removed leaving behind un dissolved H2.

3. When Sodium reacts with cold water, Hydrogen gas is evolved with the generation of heat.