Most Important Selected Qs for JEE AdvancedChemistryChemistry in Everyday Life
A chemist has 4 samples of artificial sweetener A , B , C and 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 A g N O 3 test and negative F e 4 F e C N 6 3 test. (iii) Lassaigne extract of B and D gives positive sodium nitroprusside test. Based on these observations
Options
- AA : Aspartame; B : Saccharin; C : Sucralose; D : Alitame
- BA : Alitame; B : Saccharin; C : Aspartame; D : Sucralose
- CA : Saccharin; B : Alitame; C : Sucralose; D : Aspartame
- DA : Aspartame; B : Alitame; C : Saccharin; D : Sucralose
Correct answer
A. A : Aspartame; B : Saccharin; C : Sucralose; D : Alitame
Step-by-step solution
A - Aspartame B - Saccharine C - Sucralose D - Alitame (i) A  &  D give positive test with ninhydrin because both have free carboxylic and amine groups. (ii) C form precipitate with A g N O 3 in the Lassaigne extract of the sugar because it has chlorine atoms. (iii) B  &  D give positive test with sodium nitroprusside because both have sulphur atoms.