The number of molecules per unit volume in a gas is _______ compared to solids and liquids.

Much higher

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Much lower

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Moderat

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Moderatly high

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Solution

The correct option is B
Much lower

The number of molecules per unit volume of a gas is much lower as compared to solids and liquids. therefore, gases have very low densities.

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Give reasons for the following:
(a) all temperatures in the absolute (Kelving) scale are in positive figures.
(b) Gases have lower density compared to that of solids or liquids.
(c) Gases exert pressure in all directions.
(d) It is necessary to specify the pressure and temperature of a gas while stating its volume.
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The number of molecules per unit volume in a gas is _______ compared to solids and liquids.

The correct option is B Much lowerThe number of molecules per unit volume of a gas is much lower as compared to solids and liquids. therefore, gases have very low densities.

The correct option is B
Much lower

The number of molecules per unit volume of a gas is much lower as compared to solids and liquids. therefore, gases have very low densities.