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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

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(i) only

(i) and (ii)

(ii)

(iii)

answer is B.

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Detailed Solution

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

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