Carboxylic Acid Derivatives

Q. Which reactant will give the following alcohol on reaction with one mole of phenyl magnesium bromide ($PhMgBr$) followed by acidic hydrolysis?

Q. Order of reactivity of following acid derivatives towards nucleophilic acyl substitution reactions is
$R-COCl,R-CON{H}_2,R-COO{R}^{\prime },R-COOCO-R$
(I) (II) (III) (IV)

1. (II) > (III) > (IV) > (I)
2. (IV) > (II) > (I) > (III)
3. (III) > (I) > (II) > (IV)
4. (I) > (IV) > (III) > (II)

Q. In which reaction does $C{O}_2$ gas not evolve?

1. 
2. 
3. 
4. 

Q. For a weak acid HA, Ostwald's dilution law is represented by the equation______

1. $K_a=\frac{{\alpha }^{2}c}{1-{\alpha }^{}}$
2. $\alpha =\frac{K_{a}c}{1-c}$
3. $K_a=\frac{{\alpha }^{2}c}{1-{\alpha }^2}$
4. $K_a=\frac{\alpha c}{1-{\alpha }^2}$

Q. Rate of Reaction,

is fastest when ‘Z’ is

1. $O{C}_2{H}_5$
2. $N{H}_2$
3. $Cl$
4. $OCOC{H}_3$