How will you bring about the following conversion in not more than two steps? Propanone to propene
Benzoic acid to benzaldehyde
Ethanol to 3-hydroxy butanal
Benzene to m-ntroacetophenone
Benzaldehyde to benzophenone
Bromobenzene to l-phenylethanol
Benzaldehyde to 3-phenyl propan-1-ol
Benzaldehyde to α-hydroxy phenyl acetic acid
Benzoic acid to m-nitrobenzyl alcohol