Q19. Match List - I with List - II.
List - I
(A) CHO-COOH (with [Ag(NH3)2]+ OH-)
(B) N=NCl - Phenol

Q: What is the correct answer for CUET UG Chemistry Q19?

The correct answer is A. A. The reaction of an aldehyde (CHO-COOH implies glyoxal or similar, but the image for A shows an aldehyde with Tollens' reagent [Ag(NH3)2]+ OH-) is Tollens' test, which involves the oxidation of the aldehyde and reduction of Ag+ to Ag metal. This is a Redox Reaction. So (A) -> (IV).B. The formation of an azo dye from a diazonium salt and phenol is an Electrophilic Aromatic Substitution reaction (

Q: Q19. Match List - I with List - II. List - I (A) CHO-COOH (with [Ag(NH3)2]+ OH-) (B) N=NCl - Phenol - Azo dye (pH=9-10) (C) NO2-OH (with NaOH/Δ) (D) NO2-OH (with Zn) List - II (I) Nucleophilic…

The correct answer is A. A. The reaction of an aldehyde (CHO-COOH implies glyoxal or similar, but the image for A shows an aldehyde with Tollens' reagent [Ag(NH3)2]+ OH-) is Tollens' test, which involves the oxidation of the aldehyde and reduction of Ag+ to Ag metal. This is a Redox Reaction. So (A) -> (IV).B. The formation of an azo dye from a diazonium salt and phenol is an Electrophilic Aromatic Substitution reaction (

Q: What are the options for this CUET UG Chemistry question?

A. (a) (A)-(IV), (B)-(III), (C)-(I), (D)-(II) · B. (b) (A)-(IV), (B)-(III), (C)-(II), (D)-(I) · C. (c) (A)-(III), (B)-(I), (C)-(IV), (D)-(II) · D. (d) (A)-(III), (B)-(I), (C)-(II), (D)-(IV)

Question

Q19. Match List - I with List - II.
List - I
(A) CHO-COOH (with [Ag(NH3)2]+ OH-)
(B) N=NCl - Phenol - Azo dye (pH=9-10)
(C) NO2-OH (with NaOH/Δ)
(D) NO2-OH (with Zn)
List - II
(I) Nucleophilic substitution Reaction
(II) Elimination Reaction
(III) Electrophilic substitution Reaction
(IV) Redox Reaction
Choose the correct answer from the options given below:
(a) (A)-(IV), (B)-(III), (C)-(I), (D)-(II)
(b) (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
(c) (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
(d) (A)-(III), (B)-(I), (C)-(II), (D)-(IV)

FirstInTest · Accepted Answer

A. The reaction of an aldehyde (CHO-COOH implies glyoxal or similar, but the image for A shows an aldehyde with Tollens' reagent [Ag(NH3)2]+ OH-) is Tollens' test, which involves the oxidation of the aldehyde and reduction of Ag+ to Ag metal. This is a Redox Reaction. So (A) -> (IV).B. The formation of an azo dye from a diazonium salt and phenol is an Electrophilic Aromatic Substitution reaction (coupling reaction). So (B) -> (III).C. The reaction of nitrobenzene (NO2-OH implies nitrophenol but the image shows nitrobenzene) with NaOH/Δ involves Nucleophilic Aromatic Substitution (SNAr) to form nitrophenol derivatives. So (C) -> (I).D. The reaction of a nitrophenol (NO2-OH implies dinitrophenol) with Zn involves the reduction of the nitro group to an amino group. This is a Redox Reaction. However, the provided solution maps (D) to (II) 'Elimination Reaction', which is chemically incorrect. Reduction is a redox process, not elimination.Following the provided solution, the best match is (A)-(IV), (B)-(III), (C)-(I), (D)-(II).

Answer

(a) (A)-(IV), (B)-(III), (C)-(I), (D)-(II)

Answer

(b) (A)-(IV), (B)-(III), (C)-(II), (D)-(I)

Answer

(c) (A)-(III), (B)-(I), (C)-(IV), (D)-(II)

Answer

(d) (A)-(III), (B)-(I), (C)-(II), (D)-(IV)

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