Q. $NaOCl$ is used as a bleaching agent and sterilising agent. It can be synthesised by the action of
A) $NaCl\ with\ H_{2}O$
B) $NH_{4}Cl\ with\ NaOH$
C) $Cl_{2}$ with cold and dilute $NaOH$
D) $Cl_{2}$ with hot and concentrated $NaOH$
Explanation
(c)
NaOCl is used as a bleaching agent and sterilising agent. It is formed by the action of $Cl_{2}$ with cold and dilute NaOH.
$\ \ \ \ \ \ \ 2NaOH + Cl_{2}\ \longrightarrow NaCl + NaOCl + H_{2}O$
Cold and dil.
$\ \ \ \ \ 6NaOH + 3Cl_{2}\ \longrightarrow 5NaCl + NaClO_{3} + 3\ H_{2}O$
Hot and conc.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.