MCQ
Lassaigne’s test is used to detect
- ANitrogen and halogens
- BSodium and halogens
- CHalogens and sulphur
- ✓All of the above
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Phenol $\xrightarrow[{{H^ + }}]{{{\text{CHC}}{{\text{l}}_3}{\text{ /NaOH}}}}$ Salicyladehyde
$\left[\right.$ Given $\left.: \mathrm{K}_{\mathrm{f}}\left(\mathrm{H}_{2} \mathrm{O}\right)=1.86\, \mathrm{~K}\, \mathrm{~kg}\, \mathrm{~mol}^{-1}\right]$
Comment on optical activity of the products