Class 12 Chemistry MCQ Chapter 12 Aldehydes, ketones and Carboxylic Acids Solutions to each chapter is provided in the list so that you can easily browse through different chapters Class 12 Chemistry MCQ Chapter 12 Aldehydes, ketones and Carboxylic Acids Question Answer and select need one. Class 12 Chemistry MCQ Chapter 12 Aldehydes, ketones and Carboxylic Acids Guide Download PDF. AHSEC Chemistry Multiple Choice Class 12 Solutions.
Class 12 Chemistry MCQ Chapter 12 Aldehydes, ketones and Carboxylic Acids
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Aldehydes, ketones and Carboxylic Acids
Chapter: 12
| MCQ |
1. Which functional group is characteristic of aldehydes?
(i) -OH.
(ii) >C=O.
(iii) -NH₂.
(iv) -COOH.
Ans: (ii) >C=O.
2. What is the common name for the simplest aldehyde?
(i) Methanol.
(ii) Acetaldehyde.
(iii) Formaldehyde.
(iv) Ethanal.
Ans: (iii) Formaldehyde.
3. Which of the following compounds contains both a carbonyl group and a hydroxyl group?
(i) Ketone.
(ii) Carboxylic acid.
(iii) Ester.
(iv) Amide.
Ans: (ii) Carboxylic acid.
4. What suffix is used for naming aldehydes in IUPAC nomenclature?
(i) -one.
(ii) -al.
(iii) -ic acid.
(iv) -amine.
Ans: (ii) -al.
5. Which of the following compounds is known as methyl propionaldehyde?
(i) CH₃CH₂CHO.
(ii) CH₃OCH₂CHO.
(iii) CH₃(CH₂)₂CHO.
(iv) CH₃OCH(CH₃)CHO.
Ans: (ii) CH₃OCH₂CHO.
6. Among the following acids, the strongest one is:
(i) Formic acid.
(ii) Propionic acid.
(iii) Butyric acid.
(iv) Benzoic acid.
Ans: (i) Formic acid.
7. The reaction of alcohols with heavy metal catalysts such as Ag or Cu results in the formation of:
(i) Aldehydes from tertiary alcohols.
(ii) Ketones from primary alcohols.
(iii) Aldehydes from primary alcohols.
(iv) Ketones from tertiary alcohols.
Ans: (iii) Aldehydes from primary alcohols.
8. The carbonyl group is polar because:
(i) Carbon has a higher electronegativity than oxygen.
(ii) Oxygen has a higher electronegativity than carbon.
(iii) Both carbon and oxygen have the same electronegativity.
(iv) Carbon has no electronegativity.
Ans: (ii) Oxygen has a higher electronegativity than carbon.
9. Which reagent is used to convert p-fluorotoluene to p-fluorobenzaldehyde?
(i) CrO₃.
(ii) PCC.
(iii) O₃.
(iv) DIBAL-H.
Ans: (i) CrO₃.
10. Cannizzaro reaction cannot be given by:
(i) (CH), CCHO.
(ii) CHCHO.
(iii) HCHO.
(iv) CH.CHO.
Ans: (ii) CHCHO.
11. The formation of cyanohydrin from a ketone is an example of:
(i) Electrophilic addition.
(ii) Nucleophilic addition.
(iii) Nucleophilic substitution.
(iv) Electrophilic substitution.
Ans: (iii) Nucleophilic substitution.
12. What is the major product formed on drastic oxidation of acetophenone?
(i) Benzyl alcohol.
(ii) Phenol.
(iii) Benzoic acid.
(iv) Acetic acid.
Ans: (iii) Benzoic acid.
12. The aldol condensations of acetaldehyde results in the formation of:
(i) CH-CO-CHOH-CH.
(ii) CH-CHOH-CH, CHO.
(iii) CH-CH-CHOH-CHO.
(iv) CH₂CH₂OH + CH,COOH.
Ans: (ii) CH-CHOH-CH, CHO.
14. Which of the following compounds is identified as compound A with molecular formula C₈H₈O?
(i) Benzaldehyde.
(ii) Acetophenone.
(iii) Benzophenone.
(iv) Phenol.
Ans: (ii) Acetophenone.
15. Cannizzaro reaction is not given by:
(i) Trimethyl acetaldehyde.
(ii) Acetaldehyde.
(iii) Benzaldehyde.
(iv) Formaldehyde.
Ans: (ii) Acetaldehyde.
