MCQ
Major product is :


- A

- B

- ✓

- D







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${(C{H_3}O)_2}CHC{H_2}C{H_2}C{H_2}Br\xrightarrow{{Mg}}\xrightarrow{{{H_2}C = O}}\xrightarrow[{heat}]{{{H_3}{O^ + }}}$
$Cr _{2} O _{7}^{2-}+14 H ^{+}+6 e ^{-} \rightarrow 2 Cr ^{3+}+7 H _{2} O$
The amount of $Cr ^{3+}$ obtained was $0.104\, g$. The
efficiency of the process(in\%) is
(Take : $F =96000\, C$, At. mass of chromium $=52$ )

