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Chapter 5: Problem 90
Which of the following does not give benzoic acid on hydrolysis? (a) Ethyl benzoate (b) Benzene carbonitrile (c) Benzyl chloride (d) Benzoyl chloride
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In the industrial preparation of benzoic acid from toluene with air, the reaction takes place in the presence of (a) \(\mathrm{Pt}\) (b) \(\mathrm{V}_{2} \mathrm{O}_{5}\) (c) \(\mathrm{Cl}_{2}\) (d) \(\mathrm{Cu}\)
Salicylic acid is more acidic than o-methoxybenzoic acid though both have electron releasing groups i.e., \(-\mathrm{OH}\) and \(-\mathrm{OCH}_{3} .\) This is because (a) \(-\mathrm{OH}\) is a stronger electron releasing group compared to \(-\mathrm{OCH}_{3}\). (b) salicylate ion is stabilized by intramolecular hydrogen bonding. (c) salicylic acid has two replaceable hydrogen atoms. (d) \(-\mathrm{OCH}_{3}\) has a stronger steric effect to prevent the stabilization of the carboxylate anion.
Formaldehyde reacts with ammonia to form (a) formaldehyde ammonia (b) hexamethylene pentamine (c) hexamethylene tetramine (d) tetramethylene hexaamine
Directions: Each question contains Statement- 1 and Statement- 2 and has the following choices (a), (b), (c) and (d), out of which ONLY ONE is correct. (a) Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanation for Statement- 1 (b) Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanation for Statement- 1 (c) Statement- 1 is True, Statement- 2 is False (d) Statement- 1 is False, Statement- 2 is True Statement 1 Acetals and ketals are unstable in aqueous acid conditions, but quite stable to alkaline conditions. and Statement 2 A weaker base like (OH) cannot displace a stronger base like (OR) found in acetals and ketals.
Identify the true statements about methanoic acid. (a) It is formed by heating glycerol with oxalic acid to about \(373 \mathrm{~K}\). (b) It gives formyl chloride when treated with \(\mathrm{PCl}_{5^{*}}\) (c) It is a stronger acid than benzoic acid. (d) It gives carbon monoxide on heating with con. \(\mathrm{H}_{2} \mathrm{SO}_{4}\).
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