Question

Which statements are correct?
1. Addition of $AgN{O}_3$ drop by drop in excess of $KI$ leads to the formation of $+$vely charged sol of $AgI$.
2. Adsorption characteristic of an adsorbent may be increased by making it in finely divided form.
3. Catalyst help in attaining the equilibrium earlier but does not influence equilibrium constant in reversible reactions.
4. Decolorisation of raw sugar is based on absorption.
5. Gas masks containing animal charcoal acts on the basis of selective adsorption.
6. The micelle formation of soaps depends upon hydrophobic and hydrophilic entities present in soap.

• A. $2,3,5,6$
• B. $2,3,4,5$
• C. $1,2,5,6$
• D. $1,2,3,4$

Answer 1

The correct option is A $2,3,5,6$

1. Addition of $AgN{O}_3$ in $KI\left(excess\right)$ gives $-$ve sol due to adsorption of $I^{-}$ on $AgI$, i.e., preferential adsorption.

2. An increase in surface area of adsorbent increases the adsorption rate.

3. The forward reaction is catalysed and takes place fastly whereas the increase in products concentration makes reverse reaction fast and thus, equilibrium is attained earlier.

4. Animal charcoal adsorbs colouring matter of sugar.

5. $C{H}_4$ and $CO$ are preferentially adsorbed on animal charcoal

6. The micelle formation of soaps depends upon hydrophobic and hydrophlilic entities present in soap and it is reason why soaps forms micelles.