BSC 1st Year Chemistry 1st Chapter. We covered all the BSC 1st Year Chemistry 1st Chapter MCQs in this post for free so that you can practice well for the exam.
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BSC 1st Year Chemistry Objective 1st Chapter for Students
The correct increasing order of the acid strength of (I) Benzoic acid (II) 4-nitrobenzoic acid. (III) 3,4-dinitrobenzoic acid and (IV) 4-methoxybenzoic acid is:
(A) I < II < III < IV
(B) II < I < I < III
(C) IV < I < II < III
(D) IV < II < I < III
Option c – IV
The reagent used to distinguish between acetaldehyde and benzaldehyde is:
(A) Tollen’s reagent
(B) Semicarbazide
(C) Fehling’s solution
(D) 2,4-dinitrophenyl hydrazine
Option c – Fehling’s solution
The reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by the elimination of water. The reagent is:
(A) A Grignard reagent
(B) Hydrazine in the presence of a feebly acidic solution
(C) Hydrocyanic acid
(D) Sodium hydrogen sulfite
Option b – Hydrazine in the presence of a feebly acidic solution
The product formed by the reaction of an aldehyde with a primary amine is:
(A) Ketone
(B) Carboxylic acid
(C) Aromatic acid
(D) Schiff base
Option d – Schiff base
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