MCQ
Reaction is called


- ✓Wolff-Kishner reaction
- BTischenko reaction
- CReformatsky reaction
- DGattermann reaction

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| Column $I$ | Column $II$ |
| $Image$ | $(p)$ sodium fusion extract of the compound gives Prussian blue colour with $\mathrm{FeSO}_4$ |
| $Image$ | $(q)$ gives positive $\mathrm{FeCl}_3$ test |
| $Image$ | $(r)$ gives white precipitate with $\mathrm{AgNO}_3$ |
| $Image$ | $(s)$ reacts with aldehydes to form the corresponding hydrazone derivative |

$\mathrm{Cu}_{(\mathrm{s})}+2 \mathrm{Ag}^{+}\left(1 \times 10^{-3} \,\mathrm{M}\right) \rightarrow \mathrm{Cu}^{2+}(0.250\, \mathrm{M})+2 \mathrm{Ag}_{(\mathrm{s})}$
$\mathrm{E}_{\mathrm{Cell}}^{\ominus}=2.97\, \mathrm{~V}$
$\mathrm{E}_{\text {cell }}$ for the above reaction is $....\,V.$ (Nearest integer)
[Given : $\log 2.5=0.3979, T=298\, \mathrm{~K}]$
This polymer $(B)$ is obtained when acetone is saturated with hydrogen chloride gas, $B$ can be