The correct increasing order of the reactivity of halides for $S_N1$ reaction is

  • A
    $CH_3-CH_2-X < (CH_3)_2CH-X < CH_2=CH-CH_2-X < PhCH_2-X$
  • B
    $(CH_3)_2CH-X < CH_3-CH_2-X < CH_2=CH-CH_2-X < PhCH_2-X$
  • C
    $PhCH_2-X < (CH_3)_2CH-X < CH_3-CH_2-X < CH_2=CH-CH_2-X$
  • D
    $CH_2=CH-CH_2-X < PhCH_2-X < (CH_3)_2CH-X < CH_3-CH_2-X$

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$A$. $C_2H_5Cl$,moist $Ag_2O$$I$. $CH_3CH_2ONO$
$B$. $C_2H_5Cl$,aqueous ethanolic $AgCN$$II$. $C_2H_4$
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The correct match is:

Which of the following is likely to undergo racemization during alkaline hydrolysis by $SN^1$ mechanism?

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