IN BISULPHITE ADIITION (NaHSO₃) OF ALDEHYDES & METHYL KETONES

Q-1 WHICH ATOM ATTACKS ON CARBONYL GROUP ?

Q-2 NEUCLEOPHILE INVOLVE IN THIS REACTION ?

'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