Stain used to make the wetted area of filter paper strip more visible is_____________?
Correct answer: C. Ninhydrin stain
- A. Eosin stain
- B. Haemotoxin stain
- C. Ninhydrin stain
- D. Blue stain
Explanation
Ninhydrin reacts with amino groups and produces a coloured compound, making the marked or wetted region on filter paper easier to see. It is commonly used to detect amino acids and related compounds on paper.
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