Top 80+ Solved Aldehydes and Ketones MCQ Questions Answer
Q. Which of the following will not give the iodoform test ?
a. Acetophenone
b. Ethanal
c. Benzophenone
d. Ethanol
Q. Haloform test is given by the following substance……………
a. HCHO
b. (CH3)2 CO
c. CH3OCH3
d. CH3CH2Cl
Q. Dimethyl ketones are usually characterized through………….
a. Tollen's reagent
b. Iodoform test
c. Schiff's test
d. Benedict's reagent
Q. If formaldehyde and KOH heated then we gets,
a. Acetylene
b. Methane
c. Methyl alcohol
d. Ethyl formate
Q. Acetaldehyde reacts with C2H5 MgCl the final product is…………
a. An aldehyde
b. A ketone
c. A primary alcohol
d. A secondary alcohol
Q. Aldol condensation of acetaldehyde involves the formation of which of the following intermediate?
a. Acetate ion
b. A carbanion
c. A carbonium ion
d. A free radical
Q. Aromatic aldehyde undergo disproportionation in presence of sodium or potassium hydroxide to givecorresponding alcohol and acid. The reaction is known as …………..
a. Wurtz's reaction
b. Cannizzaro reaction
c. Friedel-Craft's reaction
d. Claisen reaction
Q. Which of the following does not give yellow precipitate with KINaOH…………
a. Acetone
b. Acetaldehyde
c. Benzaldehyde
d. Acetophenone
Q. Which of the following does not turn Schiff's reagent to pink…………
a. Formaldehyde
b. Benzaldehyde
c. Acetone
d. Acetaldehyde
Q. Acetaldehyde and acetone differ in their reaction with…………..
a. Sodium bisulphite
b. Ammonia
c. Phosphorus pentachloride
d. Phenyl hydrazine
Q. The final product formed when acetaldehyde is reduced with sodium and alcohol is…………
a. Ethylene
b. Ethyl alcohol
c. Ethene
d. All of these
Q. The compound obtained by the reduction of propionaldehyde by amalgamated zinc and concentratedHCl is…………….
a. Propanol
b. Propane
c. Propene
d. All of these
Q. Formaldehyde when treated with KOH gives methanol and potassium formate. The reaction is knownas………..
a. Perkin reaction
b. Claisen reaction
c. Cannizzaro reaction
d. Knoevenagel reaction
Q. Acetaldehyde reacts with ……………
a. Electrophiles only
b. Nucleophiles only
c. Free radicals only
d. Both electrophiles and nucleophiles