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Question
Which of the following statements is true about Ca(OH)2?
Options
It is used in the preparation of bleaching powder.
It is a light blue solid.
It does not possess disinfectant property.
It is used in the manufacture of cement.
Solution
It is used in the preparation of bleaching powder.
Explanation:
Calcium hydroxide is used in the preparation of bleaching powder. It reacts with chlorine to form hypochlorite, a constituent of bleaching powder.
\[\ce{Ca(OH)2 + Cl2 -> CaCl2 + H2O + Ca(OCl)2}\]
It is a white amorphous powder and is sparingly soluble in water.
It possess disinfectant property and therefore, is used in white ash.
Cement is made from calcium oxide and the addition of other material such as clay, silica.
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