Question

Which of the following statements is not correct?

a) Water has a surface tension that is nearly three times greater than that of ethanol
b) The surface tension of water increases with increasing temperature
c) Water forms nearly spherical droplets on the surface of a freshly waxed car
d) A paper clip floating on the surface of water contained in a beaker will sink to the bottom of the beaker if a drop of soap solution is added to the water
e) In reverse osmosis, seawater is forced through a membrane; the salt remains on one side of the membrane and fresh water is produced on the other side

Answer 1

A paper clip floating on the surface of water contained in a beaker will sink to the bottom of the beaker if a drop of soap solution is added to the water. The statement that is not correct is (d).

Step-by-step explanation:

A paper clip floating on the surface of water contained in a beaker will sink to the bottom of the beaker if a drop of soap solution is added to the water.

When soap solution is added to water, it lowers the surface tension of water by disrupting the intermolecular forces. This causes the surface of the water to become less elastic and the paper clip would no longer float on the surface, but instead sink to the bottom of the beaker. Therefore, The statement that is not correct is (d).