WorksheetsAldehyde and Ketones
Total questions: 20
Worksheet time: 11mins
What is the reagent for Fehling’s test?
2,4-dinitrophenylhydrazine
excess I2, NaOH
Cu2+, OH-
[Ag(NH3)2]+, OH-
What is the positive observation for Tollens’ test?
brick red precipitate
silver mirror precipitate
light yellow precipitate
yellow or orange precipitate
The product formed in Aldol condensation is
an alpha, beta - unsaturated ester
a beta hydroxy acid
a beta hydroxy aldehyde or ketone
an alpha hydroxy aldehyde or ketone
Which one is the formula of ethanal?
Compounds which do not undergo Crossed aldol condensation are -
Formaldehyde and Acetaldehyde
Acetaldehyde and Propionaldehyde
Formaldehyde and Acetone
Formaldehyde and Benzaldehyde
identify reaction
aldol
cannizarro
rosenmund
etard
To convert toulene to benzaldehyde reaction used is
Gattermann koch
Etard 's reaction
Rosen mund
aldol
Acetophenone is prepared from
Friedel craft reaction
Rosenmund reaction
Sandmayer reaction
Wurtz reaction
Choose the name reaction that produces benzaldehyde from Toluene and Chromyl chloride.
Aldol condensation
Gattermann Koch reaction
Etard reaction
Clemmensen reduction
Which of the following is used in Rosenmund reduction?
LiAlH4
H2 /Pd-BaSO4
Na/Ethanol
NaBH4
Choose the correct name of this molecule.
propanol
propanal
propanone
butanone
Test for aldehyde
Add Tollen’s reagent, warm to produce a silver mirror
Add bromine water which changes from orange to colourless
Add damp red litmus paper which turns blue
Add silver nitrate which produces a white precipitate
Type of mechanism that aldehydes and ketones undergo
Electrophilic addition
Nucleophilic addition
Electrophilic substitution
Nucleophilic substitution
Aldehyde or ketone to alcohol
Acidified potassium dichromate, heat and distil
KCN followed by dilute sulfuric acid at room temperature
Acidified potassium dichromate, heat under reflux
NaBH4 in aqueous ethanol at room temperature
Aldehyde or ketone to hydroxynitrile
Acidified potassium dichromate, heat and distil
KCN followed by dilute sulfuric acid at room temperature
Acidified potassium dichromate, heat under reflux
NaBH4 in aqueous ethanol at room temperature
Aldehyde or ketone to alcohol
Acidified potassium dichromate, heat and distil
KCN followed by dilute sulfuric acid at room temperature
Acidified potassium dichromate, heat under reflux
Hydrogen and nickel catalyst under high pressure
Alcohol to alkene
Acidified potassium dichromate, heat under reflux
Conc. sulfuric acid, heat under reflux
Potassium hydroxide in ethanol, heat
Aqueous sodium hydroxide, heat under reflux
