MCQ
Which of the following has second ionisation potential less than expected
- A$Cr$
- ✓$Zn$
- C$V$
- D$Mo$
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Considering the above reaction, $X$ and $Y$ respectively are

$\mathop {(A)}\limits_{ gives\,\,positive ~\\ iodoform\,Test } \xrightarrow[\begin{subarray}{l} (ii)\,{H^ + },{H_2}O + ~\\ (iii)\,conc.\,{H_2}S{O_4}/\Delta \end{subarray} ]{{{\text{(i) C}}{{\text{H}}_{\text{3}}}{\text{MgBr}}}}(B)\xrightarrow{{{O_3}/Zn,{H_2}O}}$
$X, Y$ and $Z$ can be described as