JEE Main 2016 · 10 Apr · Shift 1 · Chemistry Q60

ChemistrySingle correct+4 / -1Question 60 of 90

Observation of "Rhumann's purple" is a confirmatory test for the presence of :

Reducing sugar

Cupric ion

Protein

Starch

Answer and worked solution

Official answer: C

Ninhydrin reacts with the free amino groups of amino acids and proteins to give Ruhemann's purple.

JEE Main 2016 · 10 Apr · Shift 1, Chemistry question 60