CH₃Br = Nu + Br⁻ The decreasing order of the rate of the above reaction with nucleophiles (Nu⁻) A to D is

[Nu⁻=(A) PhO^−,(B)AcO⁻, (C) HO^−, (D) CH₃O⁻]

(a) A>B>C>D
(b) B>D>C>A
(c) D>C>A>B
(d) D>C>B>A

'x' gm of a compound A3B2C5 contains 'y' gm of A atoms

 

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how to represent the possible fischer projections for 2-bromohexane