WorksheetsIs Matter Around Us Pure?
Total questions: 11
Worksheet time: 8mins
In which of the following - the solute is liquid but the solvent is solid?
Air containing moisture
Adsorption of H2 gas in Pd
Zinc amalgam
Homogeneous mixture of water and ethanol
What is the percentage by volume of nitrogen in atmosphere?
50 %
60%
70%
78%
Rusting of an article made up of iron is called
(a) corrosion and it is a physical as well as chemical change
(b) dissolution and it is a physical change
(c) corrosion and it is a chemical change
(d) dissolution and it is a chemical change
What is the name of the metal which exists in liquid state at room temperature?
(a) Sodium
(b) Potassium
(c) Mercury
(d) Bromine
When the liquid is spun rapidly, the denser particles are forced to the bottom and the lighter particles stay at the top. This principle is used in:
(a) Centrifugation
(b) Fractional distillation
(c) Evaporation
(d) Tunneling
The amount of solute present per unit volume or per unit mass of the solution/solvent is known as
(a) Composition of solute
(b) Concentration of a solvent
(c) Concentration of a solute
(d) Concentration of a solution
A solution of iodine in alcohol known as ‘tincture of iodine’, has ____________ as the solute and alcohol (liquid) as the solvent.
IODINE
WATER
ALCOHOL
SPIRIT
A blue iris in an eye is blue due to
Brownian Motion
Tyndall Effect
Electrophoresis
Centrifugation
When colloids are subjected to an electrical field particles move towards an electrode and precipitate. Name the process.
Peptization
Electrophoresis
Brownian Movement
Tyndall Effect
Coloured gemstone is an example of
Gel
Solid Sol
Emulsion
Aerosol
Observe the dots in the chromatogram. Which of the following would have highest solubility?
A
B
C
All have same solubility
