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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 -

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 AgNO_{3} test and negative Fe_4[Fe(CN)_{6}]_{3} test.

(iii) Lassaigne extract of B and D gives positive sodium nitroprusside test.

Based on these observations which option is correct?

Option: 1

A : Alitame

B : Saccharin

C : Aspartame

D : Sucralose


Option: 2

A : Saccharin 

B : Alitame

C :  Sucralose

D :  Aspartame


Option: 3

A : Aspartame

B : Alitame

C :  Sucralose

D :  Saccharin


Option: 4

A : Aspartame

B :  Saccharin

C :  Sucralose

D :  Alitame


Answers (1)

best_answer

 


(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.

Posted by

Suraj Bhandari

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