Given below are two statements: Statement (I):Viscosity of gases is… | JEE Main 2024 (27 Jan, Shift 1)

Q8JEE Main 2024 · 27 JAN · SHIFT 1Easy

Viscosity & Stokes' Law

Given below are two statements:

Statement (I) :Viscosity of gases is greater than that of liquids.

Statement (II): Surface tension of a liquid decreases due to the presence of insoluble impurities. In the light of the above statements, choose the most appropriate answer from the options given below:

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Answer: (b)

Statement I: gases have much lower viscosity than liquids (air $\approx 1.8\times10^{-5}$ Pa s, water $\approx 10^{-3}$ Pa s). Incorrect.
Statement II: insoluble impurities (dust, grease) on the surface reduce the surface tension. Correct.
So the answer is (b) Statement I is incorrect but Statement II is correct.

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