MCQ
The optically active species among the following is
- A$[Cr(NH_3)_6]^{3+}$
- B$[Co(CN)_6]^{3-}$
- ✓$[Co(gly)_3]$
- D$[Ru(NH_3)_6]^{3+}$

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$A.$ Phenol $B.$ Cresol
$C.\, m-$ Nitrophenol $D.\, p-$ Nitrophenol
($A$) can also be prepared by reaction of $\mathrm{P}_4$ and $\mathrm{HNO}_3$
($B$) is diamagnetic
($C$) contains one $\mathrm{N}-\mathrm{N}$ bond
($D$) reacts with $\mathrm{Na}$ metal producing a brown gas

Above conversion can be achieved by
${C_6}{H_5} - N{H_2}\xrightarrow[{HCl}]{{NaN{O_2}}}A\xrightarrow{{CuCN}}B\xrightarrow{{{H_2}/Ni}}C\xrightarrow{{HN{O_2}}}D$
product $(D)$ would be