Single Choice

How would you obtain a sol of Agl , the particles of which migrate toward cathode under the electric filed?

ABy adding little excess of $$KI$$ to $$AgNO_3$$ solution
BBy adding little excess of $$AgNO_3$$ to $$KI$$ solution
Correct Answer
CBy mixing equal volumes of 0.010 M $$AgNO_3$$ ad 0.010 KI
DNone of these

Solution

We want to prepare sol of AgI having positively charged particles , so a little excess of $$Ag^+$$ should be added to KI.

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