12th Chemistry Study Material. We covered all the 12th Chemistry Study Material MCQs in this post for free so that you can practice well for the exam.
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12th Chemistry Study Material Objective for Students
Reimer-Tiemann reaction involves:
(A) Carbanion intermediate
(B) A carbene intermediate
(C) Carbonium ion intermediate
(D) Free radical intermediate
Option b – A carbene intermediate
Phenol with Hinsberg’s reagent gives:
(A) Sulphone
(B) Sulphanilic acid
(C) Sulphonic ester
(D) Sulphonal
Option c – Sulphonic ester
Electrophilic substitution reactions in phenol take place at:
(A) p-position
(B) m-position
(C) o-position
(D) o- and p-positions
Option d – o- and p-positions
Condensation of phenol and phthalic anhydride gives:
(A) Methyl orange
(B) Phenol red
(C) Salicylic acid
(D) Phenolphthalein
Option d – Phenolphthalein
The major product obtained from the interaction of phenol with sodium hydroxide and carbon dioxide is:
(A) Salicylaldehyde
(B) Salicylic acid
(C) Phthalic acid
(D) Benzoic acid
Option b – Salicylic acid
Phenyl magnesium bromide on reacting with ethanol forms:
(A) Phenol
(B) Benzene
(C) Ethane
(D) Isopropyl phenyl ether
Option b – Benzene
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