The correct order of the acidic strength is

The correct order of strengths of the carboxylic acids

is

Arrange the following acids in the decreasing order of their acidic strength:

(I)	(II)	(III)	(IV)

Compare the acidic strength of the given acids

(I)	(II)	(III)	(IV)
${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{COOH}$

The order of reactivity of phenyl magnesium bromide $\left(\mathrm{PhMgBr}\right)$ with the following compounds:

Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is _____.