Q 1 :    

In the Claisen-Schmidt reaction to prepare 351 g of dibenzalacetone using 87 g of acetone, the amount of benzaldehyde required is _______ g. (Nearest integer)                      [2024]

Q 2 :    

The final product A, formed in the following multistep reaction sequence is:                         [2024]

Q 3 :    

The product of the following reaction is P.                                                 [2024]

The number of hydroxyl groups present in the product P is ______.         

Q 4 :    

Major product B of the following reaction has ___________ $\mathrm{\pi }$-bond.                           [2024]

Q 5 :    

$1,2-\text{dibromocyclooctane}\underset{\begin{array}{c}{\text{(ii) NaNH}}_2\\ {\text{(iii) Hg}}^{2+}/{\text{H}}^{+}\\ {\text{(iv) Zn-Hg/H}}^{+}\end{array}}{\overset{\text{(i) KOH(alc.)}}{\to }}\underset{\text{(Major Product})}{\mathrm{P}}$

'P'  is                                                                                         [2025]

Q 6 :    

An organic compound (X) with molecular formula ${\mathrm{C}}_3{\mathrm{H}}_6\mathrm{O}$ is not readily oxidised. On reduction it gives ${\mathrm{C}}_3{\mathrm{H}}_8\mathrm{O}$ (Y) which reacts with HBr to give a bromide (Z) which is converted to Grignard reagent. This Grignard reagent on reaction with (X) followed by hydrolysis gives 2,3-dimethylbutan-2-ol.

Compounds (X), (Y) and (Z) respectively are:                              [2025]

• ${\mathrm{CH}}_3{\mathrm{COCH}}_3, {\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{OH}, {\mathrm{CH}}_3\mathrm{CH}\left(\mathrm{Br}\right){\mathrm{CH}}_3$

   

• ${\mathrm{CH}}_3{\mathrm{COCH}}_3, {\mathrm{CH}}_3\mathrm{CH}\left(\mathrm{OH}\right){\mathrm{CH}}_3, {\mathrm{CH}}_3\mathrm{CH}\left(\mathrm{Br}\right){\mathrm{CH}}_3$

   

• ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CHO}, {\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{OH}, {\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{Br}$

   

• ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CHO}, {\mathrm{CH}}_3\mathrm{CH}={\mathrm{CH}}_2, {\mathrm{CH}}_3\mathrm{CH}\left(\mathrm{Br}\right){\mathrm{CH}}_2$

   

Q 7 :    

Consider the following reactions. From these reactions which reaction will give carboxylic acid as a major product?

Choose the correct answer from the options given below:      [2025]

• A and D only

   

• A, B and E only

   

• B, C and E only

   

• B and E only

   

Q 8 :    

An optically active alkyl halide ${\mathrm{C}}_4{\mathrm{H}}_9\mathrm{Br}$ [A] reacts with hot KOH dissolved in ethanol and forms alkene [B] as major product which reacts with bromine to give dibromide [C]. The compound [C] is converted into a gas [D] upon reacting with alcoholic ${\mathrm{NaNH}}_2$. During hydration 18 gram of water is added to 1 mole of gas [D] on warming with mercuric sulphate and dilute acid at 333 K to form compound [E].

The IUPAC name of compound [E] is:                 [2025]

• But-2-yne

   

• Butan-2-ol

   

• Butan-2-one

   

• Butan-1-al

   

Q 9 :    

The product (A) formed in the following reaction sequence is

${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{CH}\underset{{\text{(iii) H}}_2/\mathrm{Ni}}{\overset{\begin{array}{c}{\text{(i) Hg}}^{2+}{\text{,H}}_2{\mathrm{SO}}_4\\ \text{(ii) HCN}\end{array}}{\to }}\underset{\mathrm{Product}}{\left(\mathrm{A}\right)}$                           [2025]

Q 10 :    

0.1 mole of compound ‘S’ will weigh _____ g.

(Given molar mass in g ${\mathrm{mol}}^{-1}$ C : 12, H : 1, O : 16)               [2025]