MCQ
Which of the following is prepared by electrolytic method
- A$Ca$
- B$Sn$
- C$S$
- ✓${F_2}$
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if $E_{C{u^{ + 2}}/Cu}^o\, = \, + 0.34\,V$
$E_{A{g^ + }/Ag}^o\, = \, + 0.80\,V$
$E_{cell}$ will be

$3HCHO+A\xrightarrow[{{40}\,^{o}}C]{N{{a}_{2}}C{{O}_{3}}}\underset{(82\%)}{\mathop{(B)}}$
Product $(B)$ of the above reaction is
$I :$ glycerol $II : $ glycol
$III : 1 , 3-$ propenediol $IV :$ methoxy $ -2- $ propanol