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प्रश्न
A gas has neither a definite volume nor a definite shape. Describe the molecular model to explain it.
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उत्तर
Here the molecules are far apart from each other i.e. have the greatest intermolecular distance which results in the weakest intermolecular forces of attraction. The molecules as are not
bound by any strong force move about freely and thus gases do not have a definite shape and also do not have any definite volume.
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संबंधित प्रश्न
The temperature of a substance remains unaffected during its change of state.
Ice melts at 100°C.
Evaporation takes place over the entire mass of the liquid.
Select the correct alternative
The solids are
Why liquids do not have definite shape?
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Fill in the blank
Water boils at .............
Write whether the following statement is true or false.
If the container in which a gas is collected has an opening, the gas will flow out and spread itself indefinitely.
State the property of the following substance.
Hydrogen sulphide gas has a strong rotten egg odour.
State the correct term from A, B, C, D, E, or F in List II which represents the change of state of matter or its relevant property from List I.
| List I | List II |
| 1. Solid 'X' to a Liquid 'X' | A: Condensation |
| 2. Liquid 'Y' to its vapour 'Z' | B: Vaporization |
| 3. 'Z' to 'Y' | C: Melting |
| 4. 'Y' to 'X' | D: Freezing |
| 5. The temperature at which 'Y' changes to 'Z' | E: Melting point |
| F: Boiling point |
