Ninhydrin test for amino acids and proteins

This type of question, asked 2 times: 2021 Paper 11, 5 Apr 2024. All 2 questions below, oldest first.

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Question 1
2021 Paper 11
25 $Structure of ruhemann's purple from ninhydrin test$
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Question 2
5 Apr 2024
45 $Which of the following gives a positive test with ninhydrin?$
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