A liquid is at rest in a container. In a sphere of influence, the liquid molecule at its centre is (a) attracted by other molecules in the sphere of influence. (b) attracted by other molecules outside sphere of influence. (c) repelled by other molecules outside the sphere of influence. (d) repelled by other molecules in the sphere of influence.

Answer: (a). Molecular forces act only within the sphere of influence (range about 10⁻⁹ m). A molecule at the centre is attracted equally in all directions by the molecules inside this sphere; molecules outside exert no force. So the answer is (a).

A liquid is at rest in a container. In a sphere of influence, the… | MHT CET 2026 (16 Apr, Shift 1)

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Molecular Theory & Factors

A liquid is at rest in a container. In a sphere of influence, the liquid molecule at its centre is

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Answer: (a)

Molecular forces act only within the sphere of influence (range about $10^{-9}\text{ m}$ ).
A molecule at the centre is attracted equally in all directions by the molecules inside this sphere; molecules outside exert no force.
So the answer is (a).

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