CBSE Class 12 Chemistry — Haloalkanes and Haloarenes
All previous year questions from Chapter: Haloalkanes and Haloarenes
3 questions found
2026(3 questions)
- 9
Which of the following is 'not' true about enantiomers?
1 mark· A· Properties of enantiomers - 18
Why are haloarenes less reactive towards nucleophilic substitution reaction? Give two reasons.
2 marks· B· Low reactivity of haloarenes in nucleophilic substitution - 28
Compound 'X' with molecular formula C₄H₉Br reacts with aqueous KOH to give an alcohol. The rate of this reaction depends only on the concentration of the compound 'X'. When an optically active isomer 'Y' of the compound 'X' was treated with aqueous KOH solution, the rate of reaction was found to be dependent on concentration of compound 'Y' and aqueous KOH both. (3 × 1) (a) Write down the structural formula of both 'X' and 'Y'. (b) Out of 'X' and 'Y', which one will undergo racemisation and why? (c) Out of 'X' and 'Y', which one will form product with inversion of configuration and why?
3 marks· C· SN1 vs SN2 Mechanism of C₄H₉Br