Previous year Questions of NEET Haloalkanes and Haloarenes

1. The reaction of C₆H₅CH=CHCH₃ with HBr produces :

(a) (b)

(1) Li (2) Na (3) K (4) Rb

4. Elimination reaction of 2-bromopentane to form pent-2-ene is

(A) β – Elimination reaction

(B) Follows Zaitsev rule

(D) Dehydration reaction

(a) (A), (B), (C) (b) (A), (C), (D)

5. The hydrolysis reaction that takes place at the slowest rate, among the following is

(a)

(b)

(c)

(d)

Chemistry Notes

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Physics Notes

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Biology Notes

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6. The compound A on treatment with Na gives B, and with PCl5 gives C. B and C react together to give diethyl ether. A, B and C are in the order (NEET 2018)

(a) C₂H₅OH, C₂H₆, C₂H₅Cl

(b) C₂H₅OH, C₂H₅Cl, C₂H₅ONa

(d) C₂H₅OH, C₂H₅ONa, C₂H₅Cl

(NEET2018)

(a) m-bromotoluene

(b) o-bromotoluene

(d) p-bromotoluene.

(NEET 2017)

(a)

(b)

(c)

(d)

9. Consider the reaction,

CH₃CH₂CH₂Br + NaCN → CH₃CH₂CH₂CN + NaBr

This reaction will be the fastest in (NEET-II 2016)

(a) ethanol

(b) methanol

(d) water.

10. Which of the following biphenyls is optically active?

(a) (b)

12. Twopossiblestereo-structuresof CH₃CHOHCOOH, which are optically active, are called (2015)

(a) atropisomers (b) enantiomers

13. In an SN1 reaction on chiral centres, there is (2015)

(a) inversion more than retention leading to partial racemisation

(b) 100% retention

(d) 100% racemisation.

14.

(2014)

(a) (i) and (ii) (b) (ii) and (iv)

16. Which of the following acids does not exhibit optical isomerism? (2012)

(a) Maleic acid (b) α -Amino acids

17.