JEE Main 26-Aug-2021 Shift 2 Solved Paper

● When AgNO3 is added to KI,
Kl‌

AgNO3

───▶

‌Agl↓

Kl

──▶

Agl‌┋‌I−

Negatively‌charged

Iodide ion gets adsorbed on the surface of AgI. This will result in formation of negatively charged colloids.
● When KI is added to AgNO3 following reaction takes place.
AgNO3

Kl

───▶

‌Agl↓

AgNO3

───▶

Agl‌┋‌Ag+

Positively‌charged

Silver cation gets adsorbed on surface of AgI, resulting in formation of positively charged colloids.
● Option (a) and (d) will form positively charged colloids.