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प्रश्न
In paper chromatography, how are colourless compounds commonly made visible?
विकल्प
By heating strongly
By using ultraviolet light only
By spraying with ninhydrin solution
By adding more solvent
MCQ
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उत्तर
By spraying with ninhydrin solution
Explanation:
Ninhydrin spray is used to visualize colourless compounds on the paper as coloured spots.
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