How will you convert

1.benzoic acid into benzoyl alcohol

2.benzioc acid into benzoic anhydride

3.acetic acid into propanoic acid

4.benzoic acid into methyl benzoate

5.formic acid into oxalic acid

'x' gm of a compound A3B2C5 contains 'y' gm of A atoms

 

Using above information

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how to represent the possible fischer projections for 2-bromohexane