CH3Br + Nu- -> CH3-Nu + Br-

decreasing order of rate of above reaction with nucleophile (Nu-) A to D is :-

[ Nu- = A) phO- , B) AcO- C) HO- D) CH3O-

plzz explain

'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