Question

Why do we use a pencil istead of a pen on chromatogram?​

Answer 1

Answer:

WHY DO WE USE A PENCIL INSTEAD OF A PEN ON CHROMATOGRAM??

ANS.The reason why people use pencils instead of inks it's just because pencils are made of carbon. Inks in pens contains dyes that might affect the chromatogram as inks has dyes that can potentially separate while doing chromatography. Carbon is less likely to seperate during chromatography.

Explanation:

I HOPE THAT IT'S HELPFUL FOR YOU.

Answer 2

Answer:

Pencil is always used to mark chromatography paper or TLC plates because ink may run and interfere with the chromatogram. ... As soon as the paper/plate is taken out, mark the solvent front with a pencil before the solvent evaporates and the front becomes impossible to see.

Hope it helps u !!