Question:
Choose the correct answer: Assertion (A): Non-Newtonian liquids do not follow Newtonian law. Reason (R): Viscosity changes when the rate of shear is applied.
Choose the correct answer: Assertion (A): Non-Newtonian liquids do not follow Newtonian law. Reason (R): Viscosity changes when the rate of shear is applied.
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Newtonian = Constant viscosity; Non-Newtonian = Viscosity varies with force.
Updated On: May 25, 2026
- A is true, R is false
- R is false, A is true
- A is true, R is correct explanation of A
- A is true but R is not the correct explanation of A
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The Correct Option is C
Solution and Explanation
Step 1: Concept
Rheology is the study of the flow of matter, classified into Newtonian and Non-Newtonian flow.
Step 2: Meaning
Newtonian liquids have a constant viscosity regardless of the shear rate applied.
Step 3: Analysis
Non-Newtonian liquids (like gels or suspensions) exhibit a change in viscosity when shear stress is applied (Assertion is true). This change occurs because their flow behavior is non-linear (Reason is true).
Step 4: Conclusion
The reason accurately explains why these liquids are classified as Non-Newtonian. Final Answer: (c)
Rheology is the study of the flow of matter, classified into Newtonian and Non-Newtonian flow.
Step 2: Meaning
Newtonian liquids have a constant viscosity regardless of the shear rate applied.
Step 3: Analysis
Non-Newtonian liquids (like gels or suspensions) exhibit a change in viscosity when shear stress is applied (Assertion is true). This change occurs because their flow behavior is non-linear (Reason is true).
Step 4: Conclusion
The reason accurately explains why these liquids are classified as Non-Newtonian. Final Answer: (c)
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