Q57 / 200 · NEET 2024 (Re-NEET) · Chemistry

Arrange the following compounds in increasing order of their solubilities in chloroform: $\mathrm{NaCl}, \mathrm{CH}_3 \mathrm{OH}$, cyclohexane, $\mathrm{CH}_3 \mathrm{CN}$

  • Correct answer
    A
    $\mathrm{NaCl} \lt \mathrm{CH}_3 \mathrm{CN} \lt \mathrm{CH}_3 \mathrm{OH} \lt $ Cyclohexane
  • B
    $\mathrm{CH}_3 \mathrm{OH} \lt \mathrm{CH}_3 \mathrm{CN} \lt \mathrm{NaCl} \lt $ Cyclohexane
  • C
    $\mathrm{NaCl} \lt \mathrm{CH}_3 \mathrm{OH} \lt \mathrm{CH}_3 \mathrm{CN} \lt $ Cyclohexane
  • D
    Cyclohexane $ \lt \mathrm{CH}_3 \mathrm{CN} \lt \mathrm{CH}_3 \mathrm{OH} \lt \mathrm{NaCl}$

Solution

Since $\mathrm{CHCl}_3$ is an organic solvent so, covalent (non-polar) compounds will be more soluble in it. As the dipole moment of solute increases, solubility in chloroform decreases. Hence increasing order of solubility. $\mathrm{NaCl} \lt \mathrm{CH}_3 \mathrm{CN} \lt \mathrm{CH}_3 \mathrm{OH} \lt $ Cyclohexane

Hence, the correct answer is option: 'A'.

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