MCQ - Aldol and Cannizzaro Reactions PDF

**Self-Assessment Questions** **Topic-Aldol and Cannizzaro reactions** **1.Which of the following is the essential condition for Aldol reaction?** a\) Presence of β- hydrogens b\) Presence of α- hydrogens c\) Presence of carbon atoms d\) All of the above **2. Find out the Aldol reaction?** *...

**Self-Assessment Questions** **Topic-Aldol and Cannizzaro reactions** **1.Which of the following is the essential condition for Aldol reaction?** a\) Presence of β- hydrogens b\) Presence of α- hydrogens c\) Presence of carbon atoms d\) All of the above **2. Find out the Aldol reaction?** **I)** **II)** a. Only I b. Only II c. Both I and II d. None **3. If dehydration step occurs in continuation of Aldol reaction, then it is called\_\_\_\_?** a\) Aldol dehydration reaction b\) Aldol condensation reaction c\) Intramolecular Aldol reaction d\) Aldol hydration reaction **4. Reaction of acetaldehyde and propanal in presence of aqueous base is the example for\_\_\_?** a\) self-Aldol reaction b\) Crossed Aldol reaction c\) Intramolecular Aldol reaction d\) Cannizzaro reaction **5. Which of the following carbonyl compounds undergoes Intramolecular Aldol reaction?** a\) Only aldehydes b\) Only ketones c\) Di carbonyl compounds d\) All of the above **6. When two molecules of benzaldehyde, when treated with Conc. KOH gives one oxidized product and one reduced product. This reaction is called\_\_\_\_\_?** a\) Aldol reaction b\) Cannizzaro reaction c\) Crossed Aldol reaction d\) None of the above **7. What is the key step of Cannizzaro reaction mechanism?** a\) Nucleophilic addition of hydroxide ion b\) Deprotonation by base c\) Hydride transfer d\) All of the above **8. Cannizzaro reaction is a\_\_\_?** a\) Intramolecular condensation reaction b\) Disproportionation reaction c\) Simple oxidation reaction d\) Simple reduction reaction **9. Reduced product of Cannizzaro reaction is a\_\_\_?** a\) primary alcohol b\) tertiary alcohol c\) carboxylic acid salt d\) All of the above **10. Oxidized product of Cannizzaro reaction is a\_\_\_?** a\) Salt of carboxylic acid b\) Primary alcohol c\) benzaldehyde d\) KOH [ANSWERS:] 1. \(b) Presence of α- hydrogens 2. \(c) Both I and II 3. \(b) Aldol condensation reaction 4. \(b) Crossed Aldol reaction 5. \(c) Di carbonyl compounds 6. \(b) Cannizzaro reaction 7. \(c) Hydride transfer 8. \(b) Disproportionation reaction 9. \(a) primary alcohol 10. \(a) Salt of carboxylic acid