Name the reagents used in the following reactions:

(i) C₆H₅-COCl C₆H₅-CHO

(ii) CH₃-COONa CH₄

OR

Arrange the following compounds in increasing order of their property as indicated:

(i) CH₃COCH₃, C₆H₅-CO- C₆H₅, CH₃CHO (reactivity towards nucleophilic addition reaction)

(ii)

(i) C₆H₅-COCl C₆H₅-CHO

Acid chloride on reduction using H₂ in the presence of Pd/BaSO₄, aldehyde is formed (Rosenmund’s reduction).

(ii) CH₃-COONa + NaOH + CaO CH₄ + Na₂CO₃

Soda lime (NaOH + CaO) is added to sodium acetate and then heated to give methane.

OR

(i) Aldehydes are more reactive than ketones towards nucleophilic addition reaction due to steric and electronic reasons. The presence of 2 relatively large substituents in ketones hinders the approach of nucleophile and they are electron releasing also which decreases the electrophilicity of carbon. Therefore, order of nucleophilic addition reaction is C₆H₅-CO- C₆H₅ < CH₃COCH₃ < CH₃CHO.

(ii) Presence of EWG on increases the acdity of carboxylic acid by stabilizing the conjugate base. More the no. of EWG present more will be the acidity and –Cl here acts as EWG. Thus, order of acidity is

.