Question

The reaction of calcium carbide with ${H_2}O$ gives:
1. ${C_2}{H_4}$
2. ${C_2}{H_6}$
3. ${C_2}{H_2}$
4. $C{H_4}$

Answer 1

Calcium carbide is a chemical compound of calcium and carbon, and is a white crystalline substance when pure. It is obtained from the reaction, $Ca + 2C \to Ca{C_2}$. The product obtained has a triple bond present in it.

Complete Step by step answer: When calcium carbide reacts with water, acetylene is released. It's a common process that is generally used for the production of acetylene. The reaction is very general and one of the rare reactions in which we get an organic compound from an inorganic compound.
The reaction involved in this is:
$2{H_2}O + Ca{C_2} \to {C_2}{H_2} \uparrow + Ca{(OH)_2}$
So this implies that ${C_2}{H_2}$is released by reaction of calcium carbide and water${H_2}O$.

So the correct option is 3rd.

Additional Information: Some years ago acetylene gas for welding was made in this way. Water and calcium carbide was placed in an enclosed tank and the acetylene produced was used for welding. The tank had to be drained periodically. And an old company called Union Carbide derived their name from the manufacturing of Calcium Carbide.

Note: Acetylene is an industrial substance with an unpleasant smell, which is caused by the impurities it contains. In its pure form, acetylene is a colorless gas with a characteristic faint smell, and it dissolves in water.