Question

Statement I: A needle placed carefully on the surface of water may float, whereas the ball of the same material will always sink.
Statement II: The buoyancy of an object depends both on the material and shape of the object.
A. Statement I is true, statement II is true and Statement II is a correct explanation for Statement I.
B. Statement I is true, Statement II is true and Statement II is NOT the correct explanation for Statement I.
C. Statement I is true, Statement II is false.
D. Statement I is false, Statement II is true.

Answer 1

Correct Answer - C
When a needle is placed carefully on the surface of water, it floats on the surface of water due to the surf ace tension of water, which does not allow the needle to sink. In case of a steel ball, the surface tension of the water is not sufficient to keep it floating, so it sinks down.