Top 80+ Solved Aldehydes and Ketones MCQ Questions Answer
Q. Reduction of Aldehydes and Ketones to hydrocarbon take place in the presence of ……………
a. Zn amalgam and HCl acid
b. Pb /BaSO4
c. Anhydrous AlCl3
d. Ni / Pt
Q. Reduction ofCO to 2CH can be carried out with…………
a. Catalytic reduction
b. Na/ C2 H5 OH
c. Wolf-Kischner reduction
d. LiAlH4
Q. For C2H5 CHO which of the following is incorrect……….
a. On oxidation it yields benzoic acid
b. It is used in perfumery
c. It is an aromatic aldehyde
d. On reduction yields phenol
Q. Grignard reagent on reaction with acetone forms………
a. Tertiary alcohol
b. Secondary alcohol
c. Acetic acid
d. Acetaldehyde
Q. Which of the following is incorrect………….
a. FeCl3 is used in the detection of phenols
b. Fehling solution is used in the detection of glucose
c. Tollen’s reagent is used in detection of unsaturation
d. NaHSO3 is used in the detection of carbonyl compounds
Q. Consider the following statement Acetophenone can be prepared by…………i. Oxidation of 1-phenylethanolii. Reaction of benzalthanol with methyl magnesium bromideiii. Friedel craft’s reaction of benzene with acetyl chlorideiv. Distillation of calcium benzoate
a. 1 and 2
b. 1 and 4
c. 1 and 3
d. 3 and 4
Q. Which of the following products is formed when benzaldehyde is treated with CH3 MgBr and theaddition product so obtained is subjected to acid hydrolysis.
a. Secondary alcohol
b. A primary alcohol
c. Phenol
d. Tert-Butyl alcohol
Q. Aldol condensation will not be observed in……….
a. Chloral
b. Phenyl acetaldehyde
c. Hexanal
d. Ethanol
Q. Which of the following organic compounds exhibits positive Fehling test as well as iodoformtest………….
a. Methanal
b. Ethanol
c. Propanone
d. Ethanal
Q. Which of the following will undergo aldol condensation………
a. Acetaldehyde
b. Propanaldehyde
c. Benzaldehyde
d. Trideuteroacetaldehyde
Q. Acetaldehyde cannot show …………….
a. Iodoform test
b. Lucas test
c. Benedict's test
d. Tollen's test
Q. Benzaldehyde + Sodium hydroxide
a. Benzyl alcohol
b. Benzoic alcohol
c. Hydrobenzamide
d. Cinnamic acid
Q. Benzyl alcohol and sodium benzoate is obtained by the action of sodium hydroxide on benzaldehyde.This reaction is known as ……………
a. Perkin’s reaction
b. Cannizzaro’s reaction
c. Sandmeyer’s reaction
d. Claisen condensation
Q. To distinguish between formaldehyde and acetaldehyde, we require……….
a. Tollen's reagent
b. Fehling's solution
c. Schiff's reagent
d. Caustic soda solution
Q. Which of the following will not give iodoform test?
a. Ethanal
b. Ethanol
c. 2-propanone
d. 3-pentanon