Which among the following is $NOT$ a feature of $S_{N}2$ mechanism?

  • A
    Single step mechanism.
  • B
    Backside attack of nucleophile.
  • C
    Formation of planar carbocation intermediate.
  • D
    Involves simultaneous bond breaking and bond forming.

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The reactivities of $methyl$ $chloride$,$propyl$ $chloride$ and $chlorobenzene$ are in the order:

The compounds $A$ and $B$ in the following reaction are,respectively:
$Benzene$ $\xrightarrow{HCHO + HCl}$ $A$ $\xrightarrow{AgCN}$ $B$

Which of the following will most readily give the dehydrohalogenation product?

Identify the chiral molecule from the following:

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