(i) Write structure of the product(s) formed :
(a) `CH_3-CH_2COOHoverset(Cl_2, "red phosphorus")to`
(b) `C_6H_5COCloverset(H_2,Pd-BaSO_4)to`
(c) `2HCHOoverset (Conc.KOH)to`
(ii) How will you bring the following conversions in not more than two steps:
(a) Propanone to propene.
(b) Benzyl chloride to phenyl ethanoic acid.

Explanation

(a) `CH_3CH_2-COOH overset(Cl_2,"Red phosphores")to CH_3-underset(Cl)underset(|)CH-COOH`
(b)
(c) `2HCHOoverset(Conc.KOH)underset(Delta)tounderset("Sodium formate")(HCOONa)+underset("Methanol")(CH_3OH)`
(ii)