A small steel needle is carefully floated on water in a beaker. When a few drops of kerosine are introduced into the water the needle sink.

Which of the following statements correctly explain(s) the observation?

i. there is tension on the water surface
ii. kerosine reduces the density of water so that needle becomes denser than water
iii. kerosine reduces the surface tension of water

Similar Questions

Tyres are treaded to? ...

The volume of a given mass of gas at 27oC and 800 mmHg is 76cm2. Calculate its volume at s.t.p...

It is known that a neutron exists in a light atomic nucleus. Which of the following also exists in t...

To obtain a virtual, erect and magnified image from a thin converging lens, an object must be placed...

Three electric cells each of e.m.f 1.5V and internal resistance of 1.0$\Omega$ are connected in pa...

A quantity of steam at 100°C condenses to water at the same temperature by releasing 6.9 x 104J ...

When the breaks in a car are applied, the frictional force on the tyres is? ...

A rocket is fired from the earth's surface to a distant planet. By Newton's law of universal...

The S.I unit of moment of a force is ...

Which of the following features of an electrostatic line of force is not correct? ...