MCQ
${C_6}{H_5}CONHC{H_3}$ can be converted into ${C_6}{H_5}C{H_2}NHC{H_3}$ by
- A$NaB{H_4}$
- B${H_2} - Pd/C$
- C$LiAl{H_4}$
- ✓$Zn - Hg/HCl$
This reaction is known as Clemmenson reduction.
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The correct order of ${S_{{N^1}}}$ reactivity is

Item$-I$ Item$-II$
$(I)$ Benzene $( P )$ $HCl$ and $SnCl _{2}, H _{3} O ^{+}$
$(II)$ Benzonitrile $(Q)$ $H _{2}, Pd - BaSO _{4}, S$ and quinoline
$(III)$ Benzoyl Chloride $(R)$ $CO , HCl$ and $AlCl _{3}$