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प्रश्न
Fill in the blank
All matter is made up of tiny particles called ______
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उत्तर
All matter is made up of tiny particles called atoms.
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संबंधित प्रश्न
What are the conditions for 'something' to be called 'matter'?
Fill in the following blanks with suitable words :
An element is made up of only one kind of ........
Which of the following does not have a fixed melting point/boiling point ?
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 will happen if a saturated solution is :
- heated
- cooled
One of the following represents the solution of solid in a solid. This one is :
State whether the following statement are true or false :
Salt and water can be recovered from an aqueous salt solution by the process of evaporation.
Name the process which can be used to recover salt from an aqueous salt solution.
Fill in the following blanks with suitable words :
The separation of liquids by fractional distillation is based on the difference in their .....................
Write a method to separate a mixture of sand and potash alum.
What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances ?
Explain the meaning of the term ‘matter’.
Which among the following ______ will get attracted to by magnet?
______ is a smallest particle.
What type of matter glass is?
Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
Liquids have ______.
Boiling refers to the process by which a substance changes from the liquid to the gaseous state at its ______ point.
The fluidity of solids: ______.
