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WorksheetsChemEE: Carbonyl
Total questions: 15
Worksheet time: 20mins
Which one of the compounds below forms only ONE ketone with acidified KMnO4?
Carbonyl compound CANNOT be synthesized through
Ozonolysis of alkenes
Oxidation of primary alcohol
Oxidation of secondary alcohol
Esterification
Ozonolysisi of alkene, W forms methanal and propanone. W is
Name the reaction mechanism to form X.
Nucleophilic substitution
Electrophilic addition
Nucleophilic addition
Electrophilic substitution
Methylmagnesium bromide reacts with butanone follow by hydrolysis to form organic compound X. Name X.
2-butanol
2-methyl-2-butanol
2-methyl-1-butanol
1-butanol
Which of the compound below undergoes nucleophilic addition reaction?
C6H5Cl
CH3CH3CHO
CH3CH2CH2NH2
CH3CH2CH(OH)CH3
The reaction between propanal and Fehling's reagent is a
condensation reaction
redox reaction
nucleophilic addition reaction
oxidation reaction
HCN reacts with propanal but does not react with propene because
HCN attack a high electron density centre
Alkene is unreactive
HCN attack an electron deficiency centre carbonyl carbon
Propanal has pi bond
The structure J is
The correct structure of K is
Choose compound(s) that can form 2o alcohol when hydrolysed with Grignard Reagent.
CH3COCH2CH3
(CH3)2CHCH2CHO
CH3CH2CHO
Compound P, C4H8O react with LiAlH4 to form Q, C4H10O. Both P and Q give positive result with iodoform test.
P: Butanone ; Q: Butan-2-ol
P: Butanal ; Q: Butan-2-ol
P: Butanone ; Q: Butan-2-ol
P: Propanone ; Q: Propan-2-ol
The only aldehyde that gives positive result with I2 / NaOH is
Butanal
2-methylpropanal
Ethanal
Propanal
Which of the following reagents can be used to distinguish an aldehyde from ketone?
2,4-dinitrophenylhydrazine
Aqueous bromine
Tollen's reagent
Phosphorus (V) chloride
An organic compound Z, forms a yellow precipitate with alkaline iodine solution, but not react with [Ag(NH3)2]+ solution. Compound Z may be
CH3CHO
CH3CH2CH2COCH3
CH3CH2COCH2CH3
CH3CH2CHO
