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प्रश्न
Write true or false for each statement. Rewrite the false statement correctly.
Matter cannot exist in different states.
विकल्प
True
False
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उत्तर
False.
Matter can exist in different states.
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संबंधित प्रश्न
The smallest unit of matter that exists freely in nature is called ...........
Fill in the blank :
The state of matter with definite volume and definite shape is called______
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.
Which of the following are ‘pure substances’ ?
Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
On the basis of composition of matter, milk is considered to be :
What is the most common way of expressing the concentration of a solution ?
State whether the following statement is true or false :
Sponge is an example of solid sol.
Define the emulsion. Give one example.
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.
What is the general name of the process by which tea-leaves are separated from prepared tea ?
Name the process by which common salt is purified.
Describe the method of separating a mixture containing common salt, sand and ammonium chloride.
Explain how, nitrogen , oxygen and argon gases are separated from air.
The technique which is used to separate particles of a solid suspended in a liquid quickly is called :
The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. The constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. The constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation.
(a) What do you think could (i) constituent A, and (ii) liquid D be ?
(b) What could (i) constituent B, and (ii) liquid E be ?
(c) What could liquid C be ?
(d) How will you separate the mixture containing A, B and C ?
Complete the given analogy.
Murukku from hot oil: ______:: Coffee powder residue from decoction: ______
Gases change to liquid by the process of ______.
Solids do not flow.
Define the term matter.
