Question

${\mathrm{CaOCl}}_2$ is the product formed due to the reaction between calcium hydroxide and ___ and is commonly known as ___.

• A. hydrogen, washing soda
• B. chlorine, bleaching powder
• C. hydrochloric acid, baking powder
• D. hydrochloric acid, baking soda

Answer 1

The correct option is B chlorine, bleaching powder

${\mathrm{CaOCl}}_2$ is the chemical formula of calcium oxychloride which is commonly known as bleaching powder. It is prepared by the reaction of chlorine gas with calcium hydroxide (dry slaked lime). The reaction involved is given below.
$\mathrm{Ca}\left(\mathrm{OH}{)}_2\right(\mathrm{aq})+{\mathrm{Cl}}_2(g)\to {\mathrm{CaOCl}}_2(\mathrm{aq})+H_{2}O(l)$