How will you bring about the following conversions in not more than two steps ?
i. Propanone to propene
ii. Benzoic acid to Benzaldehyde
iii. Ethanol to 3-Hydroxybutanal
iv. Benzene to m-Nitroacetopenone
v. Benzaldehyde to Benzophenone
vi. Bromobenzene to 1-Phenylethonal
vii. benzaldehyde to 3-Phenylpropan-1-ol
viii. Benzaldehyde to `alpha`-Hydrophylacetic acid
ix. Benzoic acid to m-Nitrobenzyl alcohol
