MCQ
Consider the above reaction sequence and identify the major product $P$.


- ✓Methane
- BMethanal
- CMethoxymethane
- DMethanoic acid


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$(I)$ $\begin{array}{*{20}{c}} {C{H_3}\,\,\,\,\,\,Br} \\ {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,} \\ {C{H_3} - CH - CH - C{H_3}} \end{array}$
$(II)$ $[Figure\,2]$
$(III)$ $\begin{array}{*{20}{c}} {{C_6}{H_5} - CH - {C_6}{H_5}} \\ {|\,\,\,} \\ {Br} \end{array}$
$(IV)$ $[Figure\,4]$
Which one of the following is correct sequence of the halides given above in the decreasing order of their reactivity ?
| Complexes | No. of unpaired electron | ||
| $A$ | $[CrF_6]^{-4}$ | $P$ | $5$ |
| $B$ | $[MnF_6]^{-4}$ | $Q$ | $2$ |
| $C$ | $[Cr(CN)_6]^{-4}$ | $R$ | $1$ |
| $D$ | $[Mn(CN)_6]^{-4}$ | $S$ | $4$ |

$[Co(en)_3]\,[Cr(C_2O_4)_3]$
$[Cu(NH_3)_4]\, [CuCl_4]$
$[Ni(en)_3]\,[Co(NO_2)_6]$