Advertisements
Advertisements
प्रश्न
You have been given a suspension and a solution. How could you tell the difference between them by their appearance ?
Advertisements
उत्तर
Both the given solutions will be kept stationary in different beakers for some time. The beaker in which the dissolved particles settle down after some time is a suspension and another one is a solution.
APPEARS IN
संबंधित प्रश्न
Name the processes involved in two cases.
Differentiate between an atom and a molecule.
Name the terms for the change of a solid into liquid.
What are the conditions for 'something' to be called 'matter'?
Name a non-metal which is a good conductor of electricity.
Name one element, one compound and one mixture.
What are pure substances ? Give two examples of pure substances.
A, B and C are all liquids. Liquid A has a comparatively low boiling point. On heating, liquid A vaporises completely without leaving behind any residue. Liquid A is being used increasingly as a fuel in motor vehicles either alone or by mixing with petrol. Liquid B has a very high boiling point. It also vaporises completely on heating, without leaving any residue. Liquid B is a conductor of electricity and used in making thermometers. Liquid C has a moderate boiling point. On heating, liquid C vaporises leaving behind a white solid D which is used in cooking vegetables. The condensation of vapours from C give a liquid E which turns anhydrous CuSO4 to blue.
(a) Which liquid could be an element ? Name this element.
(b) Which liquid could be a mixture ? Name this mixture.
(c) Which liquid could be a compound ? Name this compound.
(d) What could the solid D be ?
(e) What do you think is liquid E ?
What is the difference between solutions and colloids ?
Classify the following into true solutions and colloidal solutions:
Ink, Salt solution, Starch solution, Blood, Sugar solution
Define Aerosol Give one example.
Which one of the following is not a chemical change ?
One of the following represents the solution of solid in a solid. This one is :
Name the property of one of the constituents which can be used to separate a mixture of salt and iodine
Name the process which can be used to recover salt from an aqueous salt solution.
How will you separate a mixture of common salt, sulphur powder and sand ?
Describe the various steps involved in the separation of iodine, iron filings and salt from a mixture.
How will you separate water from mustard oil ?
Diffentiate between absorption and adsorption.
Gases change to liquid by the process of ______.
