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Get Answers to all your Questions
- #National Eligibility Cum Entrance Test
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A chemist has 4 samples of artifical sweetener A, B, Cand D. To identify these samples, he performed certain experiments and noted the following observations:
(i) A and D both form blue - violet colour with ninhydrin.
(ii) Lassaigne extract of C gives positive test and negative
test.
(iii) Lassaigne extract of B and D gives positive sodium nitroprusside test.
Based on these observations which option is correct?
A : Alitame
B : Saccharin
C : Aspartame
D : Sucralose
A : Saccharin
B : Alitame
C : Sucralose
D : Aspartame
A : Aspartame
B : Alitame
C : Sucralose
D : Saccharin
A : Aspartame
B : Saccharin
C : Sucralose
D : Alitame
Answers (1)
(i) A & D give a positive test with ninhydrin because both have free carboxylic and amine groups.
(ii) C form precipitate with AgNO3 in the lassaigne extract of the sugar because it has chlorine atoms.
(iii) B & D give a positive test with sodium nitroprusside because both have sulphur atoms.
Hence, the option number (4) is correct.
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