Top 80+ Solved Aldehydes and Ketones MCQ Questions Answer
Q. Which of the following is used to detect aldehydes…………..
a. Million's test
b. Tollen's reagent
c. Neutral ferric chloride solution
d. Molisch's test
Q. Which of the following aldehydes give red precipitate with Fehling solution ?
a. Benzaldehyde
b. Salicylaldehyde
c. Acetaldehyde
d. None of these
Q. Acetaldehyde and Acetone can be distinguished by………..
a. Iododorm test
b. Nitroprusside test
c. Fehling's solution test
d. DNP test
Q. Which of the following will fail to react with potassium dichromate and dilute sulphuricacid……………
a. Ethyl alcohol (ethanol)
b. Acetaldehyde (ethanal)
c. Secondary propyl alcohol (2-propanol)
d. Acetone (propanone)
Q. The key step in cannizzaro’s reaction is the intermolecular shift of ……….
a. Proton
b. Hydride ion
c. Hydronium ion
d. Hydrogen bond
Q. A compound, containing only carbon, hydrogen and oxygen, has a molecular weight of 44. Oncomplete oxidation it is converted into a compound of molecular weight 60. The original compound is ?
a. An aldehyde
b. An acid
c. An alcohol
d. an ether
Q. Which of the following has the most acidic hydrogen?
a. 3-hexanone
b. 2, 4-hexanedione
c. 2, 5-hexanedione
d. 2, 3-hexanedione
Q. Which of the following statements regarding chemical properties of acetophenone are wrong……(1) It is reduced to methyl phenyl carbinol by sodium and ethanol(2) It is oxidised to benzoic acid with acidified KMnO4(3) It does not undergo iodoform electrophilic substitution like nitration at meta position(4) It does not undergo iodoform reaction with iodine and alkali
a. 1 and 2
b. 2 and 4
c. 3 and 4
d. 1 and 3
Q. Which of the following will not give iodoform test ?
a. Isopropyl alcohol
b. Ethanol
c. Ethanal
d. Benzyl alcohol
Q. Aldol condensation is dose not ocurre between………..
a. Two different ketone
b. Two different aldehyde
c. An ketone and aldehyde
d. An aldehyde and ester
Q. In which of the following reaction new carbon carbon bond is not formed?
a. Cannizzaro reaction
b. Friedel craft reaction
c. Wurtz reaction
d. Aldol condensation
Q. Aromatic aldehydes reduce…………
a. Tollen’s reagent
b. Benedict’s reagent
c. Fehling reagent
d. All of above
Q. The product formed in aldol condensation is…………….
a. Beta hydroxy acid
b. Beta hydroxy aldehyde or ketone
c. Alpha, beta unsaturated ester
d. Alpha, hydroxy aldehyde or ketone