Chromatography 1
Ink can be separated by a method of _____
(a) Distillation (b) Filtration (c) Chromatography (d) Sedimentation
(c) Chromatography
Chromatography separates the mixture of dyes on the basis of their ----------------------------
(a) Density (b) Solubility (c) Gravity (d) Boiling point
(b) Solubility
A pure substance shows ______ spot on chromat gram
(a) 0 (b) 1 (c) 2 (d) 3
(b) 1
Though the separating funnel immiscible solutions
(a) Cannot dissolved
(b) Cannot be separated completely
(c) Can be easily decanted
(d) Can be centrifuged
(b) Cannot be separated completely
Liquids that do not mix and can be separated in a separating funnel are called ____________
Immiscible Liquids
Why is chromatography useful?
(a) As a medicine
(b) It can be used for finding clues at a crime scene
(c) It can be used to make bombs
(d) It can reduce the lack of food and water
(b) It can be used for finding clues at a crime scene
Can mixtures be separated using Chromatography?
(a) True (b) False
(a) True
Why must the base line be drawn in pencil and not pen?
(a) Pencil is good at keeping substances in place
(b) Pencil is soluble in water
(c) Pencil is insoluble in water
(d) Pencil is not colored
(c) Pencil is insoluble in water
Immiscible liquids can be separated through
(a) Centrifugation (b) Decanting (c) Separating funnel (d) Evaporation
(c) Separating funnel
What is the shape of a separating funnel?
(a) Cone (b) Square (c) Cylinder
(a) Cone
If a substance is not attracted to the water what happens to the 'dot'?
(a) Dot moves to the top of the paper
(b) Dot does not move at all
(c) Dot moves to the left or right
(d) Dot moves down to the bottom of the paper
(b) Dot does not move at all
8. In paper chromatography, the MOST soluble solute _________
(a) does not move from the start point
(b) stays closest to the start point
(c) travels furthest away from the start point
(d) can be found in the middle of the chromatogram
(c) travels furthest away from the start point
In paper chromatography, the LEAST soluble solute ______
(a) doesnot move from the start point
(b) stays closest to the start point
(c) travels farthest away from the straight point
(d) can be found in the middle of the chromatogram
(b) stays closest to the start point
What are the applications of separating funnel
(a) To seperate the mixture of oil and water.
(b) A good apparatus to separate oil and water
(c) Both a and b
(d) None
(c) Both a and b
Liquid with the lower density __________
(a) floats on top (b) floats on bottom (c) none
(a) floats on top
In chromatography, if a solute does not separate and remains on the start line ....
(a) the solute is insoluble in the solvent
(b) the solute is soluble in the solvent
(c) the solvent is insoluble in the solute
(d) the solvent is soluble in the solute
(a) the solute is insoluble in the solvent
Which separation technique would you use to find out how many pigments are contained in grass?
(a) Filtration (b) Evaporation (c) Distillation (d) Chromatography
(d) Chromatography
In chromatography, the stationary phase can be ___________ supported on a solid.
(a) Solid or liquid (b) Liquid or gas (c) Solid only (d) Liquid only
(a) Solid or liquid
A separatory funnel, also known as a ____1____ is a piece of _____2_____ glassware which is a separation technique that is used for separating ____3____ that do not dissolve in each other that are of 2 different densities.
1. separating funnel
2. Laboratory
3. 2 liquids
When allowed to stand, the liquid which is dense will float over the denser liquid forming two separate layers.
(a) True (b) False (c) Neither true nor false (d) None of these
(b) False