MCQ
A catalyst increases the rate of reaction because it
- AIncreases the activation energy
- ✓Decreases the energy barrier for reaction
- CDecreases the collision diameter
- DIncreases the temperature coefficient
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$Ni ( s )+2 Ag ^{+}(0.001 M ) \rightarrow Ni ^{2+}(0.001 M )+2 Ag ( s )$
$($ Given that $E _{\text {cell }}^{\circ}=10.5 \,V , \frac{2.303 RT }{ F }=0.059$ at $298\, K )$
$C{H_3}C{H_2}COOH\xrightarrow{{PC{l_3}}}I\xrightarrow[{AlC{l_3}}]{{{C_6}{H_6}}}II\xrightarrow[{base,heat}]{{N{H_2}N{H_2}}}III$ is
| Test | $C$ | $D$ |
| Ceric ammonium nitrate Test | Positive | positive |
| Lucas Test | Turbidity obtained after five minutes | Turbidity obtained immediately |
| Iodoform Test | Positive | Negative |
$C$ and $D$ respectively are



