Q 1 :

Acid D formed in above reaction is:                                   [2024]

• Malonic acid

   

• Oxalic acid

   

• Succinic acid

   

• Gluconic acid

   

Q 2 :

The total number of compounds from below when treated with hot ${\mathrm{KMnO}}_4$ giving benzoic acid is:           [2025]

• 3

   

• 5

   

• 4

   

• 6

   

Q 3 :

The major product ‘P’ formed in the given reaction is

                                             [2023]

Q 4 :

Compound ‘P’ undergoes the following sequence of reactions:                 [2026]

Q 5 :

An organic compound (P) on treatment with aqueous ammonia under hot condition forms compound (Q) which on heating with ${\mathrm{Br}}_2$ and KOH forms compound (R) having molecular formula ${\mathrm{C}}_6{\mathrm{H}}_7\mathrm{N}.$ Names of P, Q and R respectively are.    [2026]

• Benzoic acid, benzamide, aniline

   

• Phenylethanoic acid, phenylethanamide, benzamine

   

• Toluic acid, methylbenzamide, 2-methylaniline

   

• Benzoic acid, 4-methylbenzamide, 4-methylaniline

   

Q 6 :

The correct order of acidic strength of the major products formed in the given reactions, is:  [2026]

A. $\mathrm{PhN}{\mathrm{H}}_2\begin{array}{c}\stackrel{\left(1\right){\mathrm{NaNO}}_2+\mathrm{HCl}(<5°\mathrm{C})}{\to }\\ \left(2\right) \mathrm{CuCN}\\ \left(3\right) {\mathrm{H}}_3{\mathrm{O}}^{+}/\mathrm{\Delta }\end{array}$$\left[\mathrm{A}\right]$

B. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CHO}\underset{\mathrm{\Delta }}{\overset{{\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]}^{+},{\mathrm{OH}}^{-}}{\to }}$$\left[\mathrm{B}\right]$

C. ${\mathrm{CH}}_4+{\mathrm{O}}_2\begin{array}{c}\stackrel{ \left(\mathrm{i}\right){\mathrm{Mo}}_2{\mathrm{O}}_3 }{\to }\\ \left(\mathrm{ii}\right){\mathrm{Na}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7/{\mathrm{H}}^{+}\\ \end{array}$$\left[\mathrm{C}\right]$

D.  ${\mathrm{PhCH}}_2\mathrm{MgBr}+\mathrm{C}{\mathrm{O}}_2\begin{array}{c}\stackrel{ \mathrm{Dry} \mathrm{ether} }{\to }\\ {\mathrm{H}}_3{\mathrm{O}}^{+}\end{array}$$\left[\mathrm{D}\right]$

Choose the correct answer from the options given below:

• A > D > B > C

   

• C > A > D > B

   

• A > D > C > B

   

• C > B > A > D

   

Q 7 :

Incorrect statement is

• In carboxylic acids, the bonds to the carboxyl carbon lie in one plane and are separated by about $120°.$

   

• The carboxylic carbon is less electrophilic than carbonyl carbon because of the resonance in carboxylic acid.

   

• Aliphatic carboxylic acids upto nine carbon atoms are colorless liquids at room temperature with pleasant odours.

   

• Most carboxylic acids exist as dimer in the vapour phase.