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प्रश्न
You have been given a suspension and a solution. How could you tell the difference between them by their appearance ?
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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.
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संबंधित प्रश्न
Name the terms for the particles of matter which may or may not have independent existence.
During respiration, glucose and oxygen enter our body cells and waste products carbon dioxide and water leave the body cells by the process of :
Which of the following is a mixture ?
Salt, Air, Water, Alum, Sugar
Name the property which enables metals to be drawn into wires.
Classify the following as elements or compounds :
Iron, Iron sulphide, Sulphur, Chalk, Washing soda, Sodium, Carbon, Urea
Name a metal which forms amalgams.
There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can, however, be divided by electrolysis into two substances which belong to the same class of substances as Y.
- What type of substance could X be ? Name one substance like X.
- What type of substance could Y be ? Name one substance like Y.
- What type of substance could Z be ? Name one substance like Z.
- Which process involves absorption or release of an appreciable amount of energy : formation of substance X or formation of substance Z ?
- Name the three groups into which all the substances like Y are divided on the basis of their properties.
Calculate the concentration of a solution which contains 2.5 g of salt dissolved in 50 g of water.
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Name the process by which common salt is obtained from sea-water.
Name the process by which common salt is purified.
How will you separate iron pins from sand ?
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Naphthalene can be separated from sand :
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______ is a smallest particle.
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which exists as a liquid at room temperature.
Gas-solid is ______.
Define the term matter.
