A chemist has 4 | Chemistry in Everyday Life

JEE MAIN 2020

09-01-20 S1

Question

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 AgNO3 test and negative Fe4[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 ?

Options

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

- Ninhydrin test is specific for amino acids.
- Both aspartame and alitame contains amino acids.
- Alitame is sulphur containing compound thats why gives sodium nitroprusside test
- Saccharin also contains sulphur
- Sucralose contains chloro group thats why its Lassaigne extract gives white ppt with $\mathrm{AgNO}_3$.
$\therefore \quad \mathrm{A}=$ Aspartame, $\mathrm{B}=$ Saccharin
C = Sucralose, D = Alitame.

Question Tags

JEE Main

Chemistry

Easy

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