Carboxylic acids are converted into alkanes by

Carboxyllic Acid

How can a carboxylic acid be converted into an amine having one less carbon atom than the carboxylic acid used?

Carboxylic acid can be converted into corresponding ketone by heating their :

Carboxylic acids are reduced to alkanes/alcohols with HI, red P.

How can a carboxylic acid be converted to an aldehyde in two steps?

Carboxylic acid (A) is:

Carboxylic acid (A) is: