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प्रश्न
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 ...................
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उत्तर
The best evidence of the particles of matter are constantly moving comes from the studies of diffusion and Brownian motion.
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संबंधित प्रश्न
Intermolecular space is maximum in .......... less in ............ and the least in .........
The inter-molecular force is maximum in
What do you mean by the inter-molecular spaces? How do they vary in different states of matter?
What are the two conditions for the interconversion of states of matter ?
All kinds of matter
Name two processes which provide the best evidence for the motion of particles in matter.
What is Brownian motion? Draw a diagram to show the movement of a particle (like a pollen grain during Brownian motion.
During respiration, glucose and oxygen enter our body cells and waste products carbon dioxide and water leave the body cells by the process of :
The three important metalloids are.............................. and ..........................
If 25 mL of acetone is present in 150 mL of its aqueous solution, calculate the concentration of solution.
Define Foam 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.
Name the process by which common salt is purified.
Describe a method to separate a mixture of common salt and sand.
The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :
Select the correct answer from A, B, C, D & E for the statement given below:
An atom or group of atoms _________ having a resultant charge.
State whether true or false. If false, correct the statement.
Oil and water are immiscible with each other.
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 cannot be compressed and they have fixed volume.
