Which of these is a property of a gas.

Has a fixed volume

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Has a fixed shape

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Doesn't have a fixed volume

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Doesn't have a fixed shape

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Solution

The correct options are
B Doesn't have a fixed shape
D Doesn't have a fixed volume
The intermolecular forces in the case of gas are very very weak and hence the gas molecules are not at all held tightly. Thus a gas doesn't have a fixed shape at all.
Gases do not have a fixed volume too. It has the volume of the container in which it is kept.

Hence, the correct options are $C$ and $D$

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