Formaldehyde and formic acid can be distinguished using

In the presence of a small amount of phosphorus,aliphatic carboxylic acids react with chlorine or bromine to yield a compound in which $\alpha$-hydrogen has been replaced by a halogen. This reaction is known as:

The ease of hydrolysis in the compounds $CH_3COCl$ $(I)$, $(CH_3CO)_2O$ $(II)$, $CH_3COOC_2H_5$ $(III)$ and $CH_3CONH_2$ $(IV)$ is of the order:

Benedict’s solution is not reduced by

The decreasing order of acidity of the following benzoic acid derivatives is:

Which of the following does not give a silver mirror test with ammoniacal $AgNO_3$ solution?