Is this assumption likely to be correct?

Question

A student ignores the instruction to equilibrate the solvent chamber and does not place a cover on the chamber during the development of the chromatograph. At the end of the development, no solvent front is visible on the chromatogram. The student assumes that the solvent front is at the top of the chromatogram. Is this assumption likely to be correct?

Answer 1

sure or evaporated.

Answer 2

By not letting the chamber fill with solvent vapor and leaving to lid off during the chromatogram the solvent could be totally evaporating before it ever reaches the top of the chromatography paper (or plate). If it is left long enough in this state, the continued evaporation of solvent will carry all the components of his mixture up the paper/plate until it reaches some point were there is so little solvent that they won't travel any higher. If it separates at all, the Rf values will be wrong! The solvents commonly used for this purpose are usually quite volatile; so evaporation is a major concern!

Or to answer your question briefly: No!

Answer 3

To lift weights will gain strength.

Answer 4

yes

Answer 5

No, not in my impression.