JEE Main 2022 · 28 Jun · Shift 1 · Chemistry Q71

ChemistrySingle correct+4 / -1Question 71 of 90

Which one of the following techniques is not used to spot components of a mixture separated on thin layer chromatographic plate ?

\mathrm{I_2}

(Solid)

U.V. Light

Visualisation agent as a component of mobile phase

Spraying of an appropriate reagent

Answer and worked solution

Official answer: C

Spotting TLC plates uses iodine vapour, UV light or a sprayed reagent. A visualising agent is not put in the mobile phase.

(C)

Topics:Purification and characterisation

JEE Main 2022 · 28 Jun · Shift 1, Chemistry question 71