Q 11 :

In the Claisen-Schmidt reaction to prepare dibenzalacetone from 5.3 g of benzaldehyde, a total of 3.51 g of product was obtained. The percentage yield in this reaction was _____%.                        [2025]

Q 12 :

Identify the structure of the final product (D) in the following sequence of the reactions:

Total number of $s{p}^2$ hybridised carbon atoms in product D is _____.                [2025]

Q 13 :

Match List I with List II                          [2023]

	List I		List II
	Reaction		Reagents
A.	Hoffmann Degradation	I.	Conc. KOH, $\mathrm{\Delta }$
B.	Clemmensen reduction	II.	${\mathrm{CHCl}}_3,\mathrm{NaOH}/{\mathrm{H}}_3{\mathrm{O}}^{\oplus }$
C.	Cannizzaro reaction	III.	${\mathrm{Br}}_2$, NaOH
D.	Reimer–Tiemann Reaction	IV.	Zn–Hg / HCl

Choose the correct answer from the options given below:

• (A) – III, (B) – IV, (C) – II, (D) – I

   

• (A) – III, (B) – IV, (C) – I, (D) – II

   

• (A) – II, (B) – IV, (C) – I, (D) – III

   

• (A) – II, (B) – I, (C) – III, (D) – IV

   

Q 14 :

Match List I with List II                      [2023]

	List I		List II
	Name of reaction		Reagent used
A.	Hell–Volhard–Zelinsky reaction	I.	$\text{NaOH}+{\text{I}}_2$
B.	Iodoform reaction	II.	${\text{(i) CrO}}_2{\text{Cl}}_2,{\text{CS}}_2$ ${\text{(ii) H}}_2\text{O}$
C.	Etard reaction	III.	${\text{(i) Br}}_2/\text{red phosphorus}$  ${\text{(ii) H}}_2\text{O}$
D.	Gattermann–Koch reaction	IV.	$\text{CO},\text{HCl},{\text{anhyd. AlCl}}_3$

Choose the correct answer from the options given below:

• A–III, B–I, C–II, D–IV

   

• A–I, B–II, C–III, D–IV

   

• A–III, B–I, C–IV, D–II

   

• A–III, B–II, C–I, D–IV