Organic Chemistry Questions and Answers – Chemical Properties of Carboxylic Acids | Organic Chemistry Multiple Choice Questions and Answers

Questions
1 Hydrogenation of C6H5CHOH−COOH over Rh−Al2O3 catalyst in methanol gives which of the following?
A C6H5CH2COOH
B C6H11CHOHCOOH
C C6H5CHOHCH2OH
D C6H11CH2COOH

Answer:C6H11CHOHCOOH
2 In the anion HCOO− the two carbon-oxygen bonds are found to be of equal length. What is the reason for it?
A Electronic orbitals of carbon atom are hybridised
B The C = O bond is weaker than the C – O bond
C The anion HCOO− has two resonating structures
D The anion is obtained by removal of a proton form the acid molecule

Answer: The C = O bond is weaker than the C – O bond
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3 In a set of the given reactions, acetic acid yielded a product C

Organic Chemistry

What would be product C?

A CH3−C-C2H5(OH)C6H5
B CH3CH(OH)C2H5
C CH3COC6H5
D CH3CH(OH)C6H5

Answer: CH3−C-C2H5(OH)C6H5
4 Carboxylic acids are more acidic than phenol and alcohol because of which of the following?
A Intermolecular hydrogen bonding
B Formation of dimers
C Highly acidic hydrogen
D Resonance stabilization of their conjugate base

Answer: Resonance stabilization of their conjugate base
5 When propionic acid is treated with aqueous sodium bicarbonate CO2 is liberated. The ‘C’ of CO2 comes from which of the following?
A Methyl group
B Carboxylic acid group
C Methylene group
D Bicarbonate

Answer: Bicarbonate
6 The compound not soluble in acetic acid is which of the following?
A CaCO3
B CaO
C CaC2O4
D Ca(OH)2

Answer:CaC2O4
7 Identify the wrong statement from the following?
A Salicylic acid’s a monobasic acid
B Methyl salicylate is an ester
C Salicylic acid gives violet colour with neutral ferric chloride as well as brisk effervescence with sodium bicarbonate
D Methyl salicylate does not occur in natural oils

Answer: Methyl salicylate does not occur in natural oils
8 When CH3COOH reacts with CH3−Mg−X, which of the following is formed?
A CH3COX is formed
B Hydrocarbon is formed
C Acetone is formed
D Alcohol is formed

Answer: Hydrocarbon is formed
9 Hydrolysis of an ester gives a carboxylic acid which on Kolbe’s electrolysis yields ethane. The ester is which of the following?
A Ethyl methonoate
B Methyl ethanoate
C Propylamine
D Ethylamine

Answer: Methyl ethanoate
10 Sulphonation of benzoic acid produces mainly which of the following?
A o-sulphobenzoic acid
B m-sulphobenzoic acid
C p-sulphobenzoic acid
D o- and p-sulphobenzoic acid

Answer: m-sulphobenzoic acid

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