Question

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.

Hint:

The molecule at the centre is pulled by neighbours within the sphere of influence.

Answer 1

The Correct Option is A

Step 1: Definition:
A sphere of influence is the region within which one molecule has a sensible attraction on another.

Step 2: Centre molecule:
Neighbours inside the sphere pull it in every direction equally, so the forces cancel.

Step 3: Other molecules:
Molecules outside the sphere are beyond the range of the force. So the attraction comes from molecules inside the sphere, option (A).

Final Answer:
It is attracted by molecules inside its sphere of influence. \[ \boxed{\text{(A) }\text{attracted by molecules inside the sphere}} \]