The major products obtained from the reactions in List-II are the reactants for the named reactions mentioned in List-I. Match List-I with List-II and choose the correct option. List I List II (P) Etard reaction 1 Acetophenone →Zn-Hg,HCl (Q) Gattermann reaction 2 Toluene →(ii) SOCl2 (i) KMnO4, KOH, Δ (R) Gattermann-Koch reaction 3 Benzene →Anhyd. AlCl3CH3Cl (S) Rosenmund reduction 4 Aniline NaNO2 /HCl273-278 K 5 Phenol →Zn,Δ

(D) P → 3; Q → 4; R → 5; S → 2

(A) P → 2; Q → 4; R → 1; S → 3

(B) P → 1; Q → 3; R → 5; S → 2

(C) P → 3; Q → 2; R → 1; S → 4

(D) P → 3; Q → 4; R → 5; S → 2

JEE Advanced · Chemistry · 26. Aldehydes & Ketones

The major products obtained from the reactions in List-II are the reactants for the named reactions mentioned in List-I. Match List-I with List-II and choose the correct option.

List I List II

$(P)$ Etard reaction $1$ $Acetophenone \overset{Zn - Hg, HCl}{\to}$

$(Q)$ Gattermann reaction $2$ $Toluene \to_{(ii) {SOCl}_{2}}^{(i) {KMnO}_{4}, KOH, Δ}$

$(R)$ Gattermann-Koch reaction $3$ $Benzene \to_{Anhyd . {AlCl}_{3}}^{{CH}_{3} Cl}$

$(S)$ Rosenmund reduction $4$ $Aniline \frac{{NaNO}_{2} / HCl}{273 - 278 K}$

$5$ $Phenol \overset{Zn, Δ}{\to}$

A $P \to 2; Q \to 4; R \to 1; S \to 3$
B $P \to 1; Q \to 3; R \to 5; S \to 2$
C $P \to 3; Q \to 2; R \to 1; S \to 4$
D $P \to 3; Q \to 4; R \to 5; S \to 2$

Verified Solution

Answer & Solution

Correct Answer

(D) $P \to 3; Q \to 4; R \to 5; S \to 2$

Step-by-step Solution

Detailed explanation

Toluene is formed in the Friedel Craft's reaction, which is the reactant in Etard reaction. The Etard reaction is a chemical reaction that involves the direct oxidation of an aromatic or heterocyclic bound methyl group to an aldehyde using chromyl chloride.

Aniline on diazotization reaction gives benzene diazonium salt, which is the starting material for Gattermann reaction. Gattermann reaction is used for obtaining chlorobenzene or bromobenzene from benzenediazonium chloride by treating it with

Cu / HCl or Cu / HBr

respectively.

Phenol gives benzene on reaction with zinc dust, which is the starting material forGattermann-Kochreaction. The Gattermann-Kochreaction may simply be defined as a chemical transformation in which aromatic compounds are formylated by a mixture of carbon monoxide and hydrogen chloride in the presence of a Lewis acid catalyst such as

{AlCl}_{3}

Toluene on oxidation with potassium permanganate in basic medium gives benzoic acid. The benzoic acid on reaction with thionyl chloride gives benzoyl chloride. The acid chloride formed is the starting material for the Rosenmund reduction. The Rosenmund reduction is a hydrogenation process in which an acyl chloride is selectively reduced to an aldehyde.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Match the reactions (in the given stoichiometry of the reactants) in List-I with one of their products given in List-II and choose the correct option.

List - I	List - II
(P) $P _2 O _3$ $+~3 H _2 O \rightarrow$	(1) $P ( O )\left( OCH _3\right)$ $Cl _2$
(Q) $P _4+3 NaOH$ $+~3 H _2 O \rightarrow$	(2) $H _3 PO _3$
(R) $PCl _5+ CH _3$ $COOH \rightarrow$	(3) $PH _3$
(S) $H _3 PO _2$ $+~2 H _2 O ~+$ $4 AgNO _3 \rightarrow$	(4) $POCL _3$
	(5) $H _3 PO _4$

JEE Advanced 2023 Medium

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From JEE Advanced

Let $a_{1}, a_{2}, a_{3}, \dots$ be an arithmetic progression with $a_{1} = 7$ and common difference $8$ . Let $T_{1}, T_{2}, T_{3}, \dots$ be such that $T_{1} = 3$ and $T_{n + 1} - T_{n} = a_{n}$ fo $n \geq 1$ . Then, which of the following is/are TRUE?

JEE Advanced 2022 Hard

let

f_{1} : R \to R, f_{2} : [0, \infty) \to R, f_{3} : R \to R a n d f_{4} : R \to [0, \infty)

be defined by

f_{1} (x) = \{\begin{matrix} |x| & i f & x < 0 \\ e^{x} & i f & x \geq 0 \end{matrix}; f_{2} (x) = x^{2}; f_{3} (x) = \{\begin{matrix} \sin x & i f & x < 0 \\ x & i f & x \geq 0 \end{matrix} a n d f_{4} (x) = \{\begin{matrix} f_{2} (f_{1} (x)) & i f & x < 0 \\ f_{2} (f_{1} (x)) - 1 & i f & x \geq 0 \end{matrix}

	List – I		List – II
(A)	$f_{4}$ is	(P)	Onto but not one – one
(B)	$f_{3}$ is	(Q)	neither continuous nor one-one
(C)	$f_{2}$ of $f_{1}$ is	(R)	differentiable but not one-one
(D)	$f_{2}$ is	(S)	continuous and one-one

JEE Advanced 2014 Medium

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List - I	List - II
(P) \(P _2 O _3\) \(+~3 H _2 O \rightarrow\)	(1) \(P ( O )\left( OCH _3\right)\) \(Cl _2\)
(Q) \(P _4+3 NaOH\) \(+~3 H _2 O \rightarrow\)	(2) \(H _3 PO _3\)
(R) \(PCl _5+ CH _3\) \(COOH \rightarrow\)	(3) \(PH _3\)
(S) \(H _3 PO _2\) \(+~2 H _2 O ~+\) \(4 AgNO _3 \rightarrow\)	(4) \(POCL _3\)
	(5) \(H _3 PO _4\)

	List I		List II
$(P)$	Etard reaction	$1$	$Acetophenone \overset{Zn - Hg, HCl}{\to}$
$(Q)$	Gattermann reaction	$2$	$Toluene \to_{(ii) {SOCl}_{2}}^{(i) {KMnO}_{4}, KOH, Δ}$
$(R)$	Gattermann-Koch reaction	$3$	$Benzene \to_{Anhyd . {AlCl}_{3}}^{{CH}_{3} Cl}$
$(S)$	Rosenmund reduction	$4$	$Aniline \frac{{NaNO}_{2} / HCl}{273 - 278 K}$
		$5$	$Phenol \overset{Zn, Δ}{\to}$