Which one of the following processes is not used for the production of hydrogen gas?
Hydrolysis of calcium carbide
The electrolytic process splits water into hydrogen and oxygen gas by passing an electric current through it, so it is a genuine industrial method of producing hydrogen.
In the water gas-steam process, steam is passed over red-hot coke to give water gas (a mixture of carbon monoxide and hydrogen), which is a recognised commercial route to hydrogen.
Liquefaction and fractional distillation of coal gas is used to separate its hydrogen-rich fraction, so it too is a valid hydrogen-production method.
Hydrolysis of calcium carbide with water instead produces acetylene (C2H2) gas and calcium hydroxide, not hydrogen — this reaction is the standard method for generating acetylene, not hydrogen.
Hence, hydrolysis of calcium carbide is the process that is not used for producing hydrogen gas.
Important Questions from Chemical Reaction
An iron nail dipped in copper sulphate solution turns brown. This is due to which one of the following types of reactions?
Copper sulphate crystals available in the market are blue coloured crystals. By careful heating, they turn to white colour. Which one of the following is responsible for the blue colour?
Airbags work on the principle of a chemical reaction triggered by the impact producing a gaseous product that causes a sudden volume change. Which one among the following chemical conversions is responsible for this?
Which one of the following is the correct reactivity series with water?
Silver artefacts get tarnished in air due to the formation of
