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Amino acids detected by spraying the plate with ninhydrin solution is an example of ____________

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Amino acids detected by spraying the plate with ninhydrin solution is an example of ____________

(a) Column chromatography

(b) Thin layer chromatography

(c) Paper chromatography

(d) Liquid chromatography

I had been asked this question by my college director while I was bunking the class.

My doubt stems from Thin Layer Chromatography in chapter Methods of Purification of Engineering Chemistry I

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The correct option is (c) Paper chromatography

For explanation I would say: Amino acids detected by spraying the plate with a ninhydrin solution is an example of paper chromatography. Paper chromatography is an analytical method that is used to separate colored chemicals or substances.

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