Dinesh Objective Chemistry. We covered all the Dinesh Objective Chemistry MCQs in this post for free so that you can practice well for the exam.
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Dinesh Objective Chemistry for Students
The strongest electron-attracting group is:
(A) Cyanide
(B) Fluoride
(C) Bromide
(D) Chloride
Option a – Cyanide
Carbolic acid and methanoic acid are distinguished by:
(A) Zinc metal
(B) Aqueous caustic soda
(C) Litmus paper
(D) Soda ash
Option d – Soda ash
As the value of Ka of carboxylic acids increases, the acidity:
(A) Remains the same
(B) Cannot be predicted
(C) Increases
(D) Decreases
Option c – Increases
Electron-accepting substituents …… the acidity of carboxylic acids
(A) Increases
(B) Decreases
(C) Cannot be predicted
(D) Cannot change
Option a – Increases
The strongest acid among the following is:
(A) Ethanoic acid
(B) 2-Chloroethanoic acid
(C) 2,2-dichloroethanoic acid
(D) 2,2,2-trichloroethanoic acid
Option d – 2,2,2-trichloroethanoic acid
The least acidic compound among the following is:
(A) 4-Methoxy benzoic acid
(B) Benzoic acid
(C) 4-Nitrobenzoic acid
(D) 3-Nitrobenzoic acid
Option a – 4-Methoxy benzoic acid
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