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WorksheetsCHEMICAL TEST OF ORGANIC COMPOUND (SERIES 2)
Total questions: 20
Worksheet time: 41mins
What is the reagent for Brady’s test?
2,4-dinitrophenylhydrazine
excess I2, NaOH
Cu2+, OH-
[Ag(NH3)2]+,OH-
What is the reagent for Fehling’s test?
2,4-dinitrophenylhydrazine
excess I2, NaOH
Cu2+, OH-
[Ag(NH3)2]+, OH-
Which compound gives a brick red precipitate when react with Cu2+ ion in basic medium?
What is the reagent for Tollens’ test?
2,4-DNPH
alkaline excess I2
Cu2+, OH-
[Ag(NH3)2]+ , OH-
What is the reagent for Iodoform’s test?
2,4-dinitrophenylhydrazine
excess I2, NaOH
Cu2+, OH-
[Ag(NH3)2]+ , OH-
benzenesulphonyl chloride is the reagent for:
nitrous acid
Hinsberg’s test
iodoform test
Tollens’ test
What is the positive observation for Tollens’ test?
brick red precipitate
silver mirror precipitate
light yellow precipitate
yellow or orange precipitate
The test to detect the presence of methyl carbonyl group and methyl carbinol group is
Brady’s test
Hinsberg’s test
Iodoform test
Tollens’ test
The test that can be used to distinguish following compounds is
Brady’s test
Hinsberg’s test
Iodoform test
Tollens’ test
What is the positive observation for Brady’s test?
brick red precipitate
silver mirror precipitate
light yellow precipitate
yellow or orange precipitate
Which compound release nitrogen gas when react with nitrous acid?
Hinsberg’s test gives yellow oil to
primary amine
secondary amine
tertiary amine
primary aliphatic amine
What is the positive observation when tertiary aliphatic amine react with nitrous acid?
precipitate
yellow oil
bubble gas released
clear solution
What is the reagent for nitrous acid
NaNO2, HCl
HNO2
HNO3
NH3
What is the positive observation when aniline reacts with bromine water?
reddish brown colour of bromine decolourised
reddish brown colour of bromine remain unchanged
white precipitate
purple complex
Which compound gives a brick red precipitate when react with Cu2+ ion in basic medium?
butanone
benzaldehyde
ethanal
3-pentanone
The table below shows the result obtained when amines reacted with benzenesulphonyl chloride. Which of the following is the observation of X and Y?
X= precipitate, Y= clear solution
X= precipitate, Y= precipitate
X= clear solution, Y= clear solution
X= clear solution, Y= precipitate
When compound A react with 2,4- dinitrophenylhydrazine, it produces an orange precipitate but no brick red precipitate is formed when it react with Cu2+ ion. Compound A is
ethanol
ethanal
benzaldehyde
methanol
Which chemical test suitable to identify carbonyl group?
Lucas Test
Iodoform Test
Brady's Test
Tollen's Test
Give a suitable chemical test to differentiate between
butanal and 2-butanone
Lucas Test
Brady's Test
Hinsberg's Test
Tollen's Test
