Chemistry Liquids DUHS 2022
PMDC Verified Question 43 of 73
Viscosity is the measure of:
A
Volume
B
Resistance in the flow of a liquid
C
Fluidity of liquid
D
Mass
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Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Resistance in the flow of a liquid
Concept:

Viscosity defines a fluid's internal friction, which dictates how easily it can pour or move.

Formula:

Not applicable.

Solution:

  • When a liquid flows, layers of molecules slide past one another.


  • Strong intermolecular forces or large, entangled molecular structures create "friction" between these layers, resisting motion.


  • Viscosity is strictly defined in physics and chemistry as the quantitative measure of this resistance to flow. (e.g., Honey is highly viscous, water has low viscosity).


Why other options are incorrect:

Fluidity is the exact opposite (reciprocal) of viscosity. Volume and mass are basic extensive physical properties, unrelated to internal flow friction.

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