Question

Bleaching powder dissolves in water to form:
A. \[Ca{{(OH)}_{2}},C{{l}_{2}}\]
B. \[C{{a}^{+2}},C{{l}^{-}},Cl{{O}_{2}}^{-}\]
C. \[C{{a}^{2+}},C{{l}^{-}},Cl{{O}_{3}}^{-}\]
D. .\[C{{a}^{2+}},C{{l}^{-}},Cl{{O}_{4}}^{-}\]

Answer 1

Hint: When the bleaching powder is dissolved in water, it releases the active chlorine which will be the oxidizing agent. Chlorine tends to bring about oxidation by being reduced and gaining electrons.

Complete step by step answer: Bleaching powder is a combination of calcium hypochlorite and chloride of calcium. The chemical formula of the calcium hypochlorite is \[Ca{{(OCl)}^{+}}\] and the chemical formula of chloride of calcium is \[C{{l}^{-}}\].
The chemical formula of bleaching powder is \[CaOC{{l}_{2}}\]. Bleaching powder is also known as calcium hypochlorite.The reaction of bleaching powder with water is perhaps the most common reaction that occurs in daily life. The chemical formula of water is \[{{H}_{2}}O\]. Calcium Hypochlorite when reacted with water forms Calcium hydroxide and chlorine. The chemical formula for calcium hydroxide is \[Ca{{(OH)}_{2}}\]. Calcium hydroxide is also called as Slaked Lime.
The reaction goes as follows
\[CaOC{{l}_{2}}+{{H}_{2}}O\to Ca{{(OH)}_{2}}+C{{l}_{2}}\]
So following the chemical reaction we can say that the final products formed when bleaching powder dissolves in water are calcium hydroxide also known as slaked lime (most commonly known as) and chlorine.
So, option A is correct.

Note: The possible mistakes that can be done while solving this question are, One may make a mistake by considering Chlorine as a reducing agent. One has to know the exact chemical formula of every compound we are using.