An organic acid 'z' reacts separately with sodium bicarbonate, sod

sodium carbonate. Which one of the following represent the structure

(A) HCOOC2H

(B) CH3CH2OH

(C) CH-CH=CH2

(D) H3C-CH2-COOH​

'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