AI - Exercise Chromatography

Two or more substances that are mixed together but not chemically combined is a ___

• compound
• mixture
• keratin
• chromatography

Ink can be separated by a method of -----------------------------------------------

• distillation

• filtration

• chromatography

• sedimentation

chromatography separates the mixture of dyes on the basis of their ----------------------------

• density
• solubility
• gravity
• boiling point

What is chromatography?

• A way to see pretty colors

• A laboratory technique used to separate a mixture.

• A form of distillation

Mobile phase is

• a solid or liquid that is fixed in place

• one that moves over or through an immobilized phase that is fixed in place in a column or on the surface of flat plate

• a process in which species are washed through a chromatographic column by addition of fresh solvent

• is the time interval btw its injection onto a column and the appearance of its peak at the other end of the column

TLC stands for...

• Tender Love & Care

• Thick Layer Chromatography

• Thin Layer Chromatography

• Thin Liquid Chromatography

In TLC substances are separated because of differences in_______. Tick all that apply.

• polarity

• molecular size

• concentration

• electronegativity

The distance travelled by the compound depends on how soluble it is in the chosen solvent.

• TRUE

• FALSE

The distance travelled by the compound depends on how well it adheres to the plate.

• TRUE

• FALSE

How to calculate Rf?

• Rf = distance travelled by sample / distance travelled by solvent

• Rf = distance travelled by solvent / distance travelled by sample