Fluorobenzene (C6H5F) can be synthesised in the laboratory

(a) by heating phenol with HF and KF

(b) from aniline by diazotization followed by heating the diazonium salt with HBF4

(c) by direct fluorination of benzene with F2 gas

(d) by reacting bromobenzene with NaF solution.

'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