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प्रश्न
When a gas jar containing air is inverted over a gas jar containing bromine vapour, the red-brown bromine vapour diffuse into air. Explain how bromine vapour diffuse into air.
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उत्तर
Both air and bromine vapour are made up of tiny moving particles, which collide with each other and bounce about in all directions due to which both the gas particles mix uniformly. This is an example of diffusion.
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संबंधित प्रश्न
The smallest unit of matter that exists freely in nature is called ...........
Fill in the blank :
The substances which can flow are called ________
Define the following term of Atom .
Fill in the blank
All matter is made up of tiny particles called ______
All kinds of matter
What are the characteristics of matter?
The best evidence for the existence and movement of particles in liquids was provided by :
Which of the following are compounds ?
- CO
- No
- NO
- Co
Which of the following statements are true for pure substances ?
- pure substances contain only one kind of particles
- pure substances may be compounds or mixtures
- pure substances have the same composition throughout
- pure substances can be exemplified by all elements other than nickel
Which of the following is a sol ?
Shaving cream, Milk, Fog, Soap solution, Hairspray
In what respects does a true solution differ from a colloidal solution ?
Define Sol and give one example.
Which of the following do not exhibit Tyndall effect ?
Starch solution, Sugar solution, Ink, Salt solution, Copper sulphate solution, Ammonium chloride solution, Fog, Smoke, Car exhausts.
What is the effect of temperature on the solubility of solids in liquids ?
Explain how, impure copper sulphate can be purified by crystallisation.
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 ?
Differentiate between the-two characteristics of matter – ‘mass’ & ‘weight’.
Matter is made up of ______.
Define the term matter.
