Q. Which reaction gives colloidal solution?
A) $Cu + {HgCl}_{2}\ \longrightarrow {CuCl}_{2} + Hg$
B) $2{HNO}_{3} + 3H_{2}S\ \longrightarrow 3S + 4H_{2}O + 2NO$
C) $2Mg + {CO}_{2}\ \longrightarrow 2MgO + C$
D) $Cu + {CuCl}_{2}\ \longrightarrow {{Cu}_{2}Cl}_{2}$
Explanation
(b)
On passing $H_{2}S$ through a cold solution of an oxidant, colloidal sulphur is formed.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.