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प्रश्न
The molecules can move freely anywhere in
विकल्प
gases
liquids
solids
none of the above
उत्तर
gases
APPEARS IN
संबंधित प्रश्न
Fill in the blank
Any matter which has a definite _______ but no definite shape is called a _______
An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.
Give reason why copper metal is used for making electric wires.
Choose the correct answer.
A 15% alcohol solution means :
21.5 g of sodium chloride dissolves in 60 g of water at 25°C. Calculate the solubility of sodium chloride in water at that temperature.
What is meant by a solution ? Give two examples of solutions.
There are three liquids A, B and C, all having different densities and different boiling points. Liquids A and C are organic in nature whereas liquid B is considered to be inorganic. When liquids A and B are put together in a container, they form a single layer. On the other hand, when, liquids B and C are mixed, they form two separate layers :
(a) Which process will you use to separate a mixture of A and B ?
(b) Which method will you use to separate a mixture of B and C ?
(c) Name the liquids which would behave like (i) A (ii) B and (iii) C.
Matter is made up of ______.
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
Atoms are tiny particles that repel each other when they are squeezed very close.
