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The molecules of each substance are identical.
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Write true or false for the following statement
The inter-molecular forces are effective at all distances between the two molecules.
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All the molecules of a substance are .............
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The diameter of a molecule is approximately
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The inter-molecular forces are strongest in
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The molecules ____________
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The inter-molecular forces in liquids are
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Match the following columns
| Column A | Column B | ||
| A. | A molecule is composed of | i. | does not exist free in nature. |
| B. | Ice, water and water vapour | ii. | can vibrate only up to about `10^-10`m from their mean position. |
| C. | An atom | iii. | atoms. |
| D. | Gases | iv. | are the three states of water. |
| E. | The molecules of a solid | v. | occupy space |
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Define matter. What is its composition?
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What is the approximate size of a molecule?
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One litre of water has 6.02 × 1026 molecules. Estimate the size of a molecule.
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What do you mean by inter-molecular spacing?
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Describe a simple experiment to illustrate the existence of inter-molecular spacing.
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What do you mean by inter-molecular forces?
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What are the forces of cohesion and adhesion?
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State the approximate spacing between two molecules of a matter.
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The molecules in a substance are in motion. What type of path do they follow?
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Describe a simple experiment to illustrate that molecules are not at rest, but they constantly move.
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Write true or false.
The frictional force acts in the direction of motion of body
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