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Chemistry · 2024 · 3 marks
CBSE 2024 · Region 4 · Set 2 · Q27
(a) Write the IUPAC name of the given compound: (b) Why are haloalkanes more reactive towards nucleophilic substitution reactions than haloarenes?…
(a)
Write the IUPAC name of the given compound :
(b)
Why are haloalkanes more reactive towards nucleophilic substitution reactions than haloarenes ?
(c)
What happens when ethyl chloride is treated with aqueous KOH ? $\displaystyle \mathbf{1} \times \mathbf{3}$
Marking-scheme solution
(a) $\displaystyle 1$-Bromo-$\displaystyle 4$-chlorobenzene
(b) Due to Resonance, a partial double bond is formedbetween \(\displaystyle \mathrm{C}-\mathrm{X} / \mathrm{sp}^{2}\) hybridization of carbon atom in C-X bond / Instability of phenyl cation.
(c) \(\displaystyle \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Cl}+\mathrm{KOH}(\mathrm{aq}) \longrightarrow \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}+\mathrm{KCl} /\) Ethanol is formed .
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