Question

When hydrolith is treated with water, it yields
(A) \[{H_2}\]
(B) \[{H_2}{O_2}\]
(C) \[N{H_3}\]
(D) \[P{H_3}\]

Answer 1

Hint: In order to know what hydrolith will yield when treated with water, we must first have an idea about what a hydrolith is. Hydrolith is a binary compound which is known as calcium hydride and has a salt-like structure. The chemical formula for hydrolith is \[Ca{H_2}\].

Complete step by step answer:
Let us first understand about hydrolith. Hydrolith is said to be alkaline earth hydride. Hydrolith is a binary compound which is known as calcium hydride and has a salt-like structure. The chemical formula for hydrolith is \[Ca{H_2}\]. Hydrolith is grey in colour. Hydrolith is known to be a very strong reducing agent. Hydrolith is insoluble in all solvents. Therefore, it does not react vigorously. It is used as a drying agent in the desiccator. Hydrolith can also be called a philosopher's stone.
When the hydrolith, i.e., the calcium hydride reacts with water molecules and it will produce a hydrogen gas along with calcium hydroxide. The reaction for hydrolith with water is given below:
\[Ca{H_2} + 2{H_2}O \to Ca{(OH)_2} + 2{H_2}\]

Therefore, the correct answer is option (A).

Note:
We have to remember that the hydrolith (calcium hydride) has various uses such as:
- Hydrolith is used for inflating balloons.
- Hydrolith is used as a desiccant.
- Hydrolith is used in immersion lithography.
- Hydrolith is a source for hydrogen.