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Chemistry · 2024 · 2 marks
Haloalkanes and HaloarenesChemical Reactions of Haloalkanes and Haloarenes2 marksUnderstandvery short answer
CBSE 2024 · Region 3 · Set 3 · Q21
(a) Which halogen compound in the following pair will react faster in S_N 2 reaction and why?
Which halogen compound in the following pair will react faster in $\displaystyle \mathrm{S}_{\mathrm{N}} 2$ reaction and why?
Why does the presence of nitro groups at ortho- and para- positions in haloarenes increase their reactivity towards nucleophilic substitution reaction?
Marking-scheme solution
(a)
because it is primary halide/less steric hindrance
(b)
Because of electron withdrawing nature of \(\displaystyle -\mathrm{NO}_{2}\) group
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CBSE Class 12 Chemistry past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.