Consider the following statements:
(i) Young's modulus is numerically equal to the stress which will double the length of a wire.
(ii) Viscosity of gases is greater than that of liquids.
(iii) The surface tension of a liquid decreases due to the presence of insoluble contamination.
The number of above statements that are true is

Options

A. one
B. two
C. three
D. zero

Answer

B

Explanation

(i), (iii) are true but (ii) is false as we know that vicosity in gases is about 100 times less than viscosity in liquids.