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प्रश्न
What are molecules ?
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उत्तर
Molecules are made of atoms. Molecules exhibit the properties of that kind of matter and has independent exi stance.
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संबंधित प्रश्न
Gases have definite volume but no definite shape.
Define matter.
Differentiate between an atom and a molecule.
Fill in the blank :
The state of matter with definite volume and definite shape is called______
Fill in the blank
All matter is made up of tiny particles called ______
State two characteristics of matter demonstrated by Brownian motion.
What is meant by (i) elements (ii) compounds, and (iii) mixtures ?Write down the names of two elements, two compounds and two mixtures.
Draw a flow-chart for the schematic representation of different types of matter.
Choose the correct answer.
A 15% alcohol solution means :
How will you differentiate between a suspension and a colloid ?
What is meant by a solution?
Name the process which can be used to recover salt from an aqueous salt solution.
How is cream separated from milk ?
Which of the following mixture cannot be separated by using water as the solvent ?
The material which is added to water during purification process at the water works so as to disinfect it is :
The technique which is used to separate particles of a solid suspended in a liquid quickly is called :
Match the physical quantities given in column A to their S I units given in column B:
| (A) | (B) | ||
| (a) | Pressure | (i) | cubic metre |
| (b) | Temperature | (ii) | kilogram |
| (c) | Density | (iii) | pascal |
| (d) | Mass | (iv) | kelvin |
| (e) | Volume | (v) | kilogram per cubic metre |
The most reactive metal is ______.
Gases do not diffuse very easily.
Define the term matter.
