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Q.
Between $p$ -nitrophenol and salicylaldehyde, solubility in base is
Alcohols Phenols and Ethers
Solution:
$p$ -Nitrophenol is stronger acid than salicylaldehyde due to strong electron withdrawing inductive effect of $- NO _{2}$ group. Being a stronger acid, $p$ -nitrophenol is more soluble in base.