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प्रश्न
Name the different types of solutions. Give one example of each.
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उत्तर
Types of solution-
(i). Solid in solid.
Example- Brass
(ii). Solid in a liquid
Example- Tincture of iodine
(iii). Liquid in liquid
Example- ethanoic acid
(iv). Gas in a liquid
Example- CO2 in water
(v). gas in gas
Example- Air
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संबंधित प्रश्न
Define the term matter. What is it composed of?
All kinds of matter
A kind of matter which can sublime is
Name two processes which provide the best evidence for the motion of particles in matter.
What are the characteristics of matter?
When extremely small particles X derived from the anther of a flower were suspended in a liquid Y and observed through a microscope, it was found that the particles X were moving throughout the liquid Y in a very zig-zag way. It was also observed that warmer the liquid Y, faster the particles X moved on its surface.
- What could particles X be ?
- What do you think liquid Y is ?
- What is the zig-zag movement of X known as ?
- What is causing the zig-zag movement of particles X ?
- Name the scientist who discovered this phenomenon.
- What does this experiment tell us about the nature of liquid Y?
What is meant by saying that metals are sonorous ?
Name one element, one compound and one mixture.
Give reason why copper metal is used for making electric wires.
Which of the following statements are true for pure substances ?
- pure substances contain only one kind of particles
- pure substances may be compounds or mixtures
- pure substances have the same composition throughout
- pure substances can be exemplified by all elements other than nickel
In the following set of substances, one item does not belong to the set. Select this item and explain why it does not belong to the set :
Hydrogen, Oxygen, Steam, Chlorine
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 ?
Fill in the following blank :
A colloid is a ..............mixture and its components can be separated by the technique known as ...............
9.72 g of potassium chloride dissolves in 30 g of water at 70°C. Calculate the solubility of potassium chloride at that temperature.
What difference in the property of two miscible liquids enables their separation by fractional distillation ?
Name the process by which common salt is obtained from sea-water.
How would you obtain sodium chloride from a mixture of sodium chloride and sulphur without using water ?
You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture ?
Select the correct answer from A, B, C, D & E for the statement given below:
An atom or group of atoms _________ having a resultant charge.
______ is a smallest particle.
