Question

The chemical formula of calcium hypochlorite is:
(A) $COC{{l}_{2}}$
(B) $Ca{{(ClO)}_{2}}$
(C) $Ca{{(Cl{{O}_{3}})}_{2}}$
(D) $Ca{{(Cl{{O}_{4}})}_{2}}$

Answer 1

Hint: in calcium hypochlorite, calcium is bonded to two oxygen atoms and oxygen atom is linked to chlorine atom and calcium. Oxidation number of calcium is +2. Oxygen has oxidation state as -2 and chlorine has oxidation state as +1.

Complete solution step by step:
-In bleaching powder, chlorine powder or chlorinated lime, calcium hypochlorite is the main active ingredient.
-in calcium hypochlorite, calcium is bonded to two oxygen atoms and oxygen atom is linked to chlorine atom and calcium. Oxidation number of calcium is +2. Oxygen has oxidation state as -2 and chlorine has oxidation state as +1.
-structure of calcium hypochlorite is as follows:

-it is used in water treatment to remove hardness of water and also as a bleaching agent.
-it is an inorganic compound as there is no carbon involved in structure.
- it is more stable and easily available.
-it has a strong smell of chlorine and it decomposes in moist air.
-it has good solubility in soft to medium hard water.
-it is prepared by treating calcium hydroxide known as lime with chlorine gas.
It exists in two forms, dry and hydrated.
-it is commonly used for sanitization of swimming pools. It is a good oxidizing agent.

The chemical formula of calcium hypochlorite is (B) $Ca{{(ClO)}_{2}}$

Note: Calcium hypochlorite is basic in nature. It is used confused with calcium oxychloride. Oxidation number of calcium is +2. Oxygen has oxidation state as -2 and chlorine has oxidation state as +1. It is used as a disinfectant. $COC{{l}_{2}}$ is carbonyl chloride.