With increase in density, the viscosity of petroleum products _____________________?
Correct answer: A. Increases
- A. Increases
- B. Decreases
- C. Remain same
- D. Either A. or B.
Explanation
Within petroleum product families, heavier and denser fractions generally have greater intermolecular resistance to flow, so their viscosity tends to increase with density. This is an empirical generalisation rather than a universal law for every unrelated liquid.
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