MCQ
Which pair will show common ion effect
- A$BaC{l_2} + Ba\,{(N{O_3})_2}$
- B$NaCl + HCl$
- ✓$N{H_4}OH + N{H_4}Cl$
- D$AgCN + KCN$

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$A$. $\mathrm{Fe}$ $B$. $\mathrm{Mn}$ $C$. $\mathrm{Ni}$ $D$. $\mathrm{Cr}$ $E$. $\mathrm{Cd}$
Choose the correct answer from the options given below:

${C_6}{H_5} - O - C{H_2} - C{H_3}\xrightarrow{{Excess\,HI/\Delta }}\left[ X \right] + \left[ Y \right]$
$[X]$ and $[Y]$ will respectively be
