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Chemistry · 2025 · 3 marks
Haloalkanes and HaloarenesChemical Reactions of Haloalkanes and Haloarenes3 marksUnderstandshort answer
CBSE 2025 · Region 6 · Set 3 · Q25
Write any two differences between S_N 1 and S_N 2 reactions. Which of the following compounds would undergo S_N 1 reaction faster and why? or
Write any two differences between $\displaystyle \mathrm{S}_{\mathrm{N}} 1$ and $\displaystyle \mathrm{S}_{\mathrm{N}} 2$ reactions. Which of the following compounds would undergo $\displaystyle \mathrm{S}_{\mathrm{N}} 1$ reaction faster and why?
or
orMarking-scheme solution
SN1
SN2
Unimolecular
Bimolecular
It follows first order kinetics
It follows second order kinetics
Retention of configuration
Inversion of configuration
Racemisation occurs
No racemisation is seen
Takes place through formation of
carbocation
Takes place through formation of
transition state
Occurs in polar protic solvent
Occurs in polar aprotic solvent
Rate is independent of the
concentration of the nucleophile.
Rate is dependent on the
concentration of the nucleophile., because of the stability of benzyl carbocation
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CBSE Class 12 Chemistry past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.