I'm just entered class 12th and my tryst with organic chemistry thus begun but I'm too confused about which book should I buy for reference. Anyone I ask about this and he'll recommend a different book. hence, please help me out by answering this simple question- What reference book should I buy for Organic chemistry for IIT-JEE? Please name just one book! Thanks & Regards, Shiv.

'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