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प्रश्न
Name a metal which is yellow in colour.
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उत्तर
Gold is yellow in colour.
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संबंधित प्रश्न
Define the term matter. What is it composed of?
Fill in the following blank with suitable words :
The best evidence that the particles of matter are constantly moving comes from the studies of ................. and ...................
In a beam of sunlight entering a room, we can sometimes see dust particles moving in a haphazard way in the air. Why do these dust particles move?
Name a non-metal which is a good conductor of electricity.
Name one solid, one liquid and one gaseous non-metal.
Which of the following are ‘pure substances’ ?
Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
Give reason why graphite is used for making elecrode in a dry cell.
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 ?
Which of the two will scatter light : soap solution or sugar solution ? Why ?
State whether the following statement is true or false :
Bread is an example of solid foam.
How will you differentiate between a suspension and a colloid ?
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Name the process which is used in milk dairies to separate cream from milk.
Write a method to separate a mixture of sand and potash alum.
How will you separate camphor, common salt and iron nails from their mixture ?
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Evaporation does form bubbles.
Gas-solid is ______.
