Assertion (A) > : With the increase of temperature, the viscosity of glycerine increases. Reason (R) > : Rise of temperature increases kinetic energy of molecules.

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Q: 143 (IAS/2002)

Assertion (A) : With the increase of temperature, the viscosity of glycerine increases.
Reason (R) : Rise of temperature increases kinetic energy of molecules.

question_subject: 

Science

question_exam: 

IAS

stats: 

0,14,43,30,8,5,14

keywords: 

{'glycerine increases': [0, 0, 1, 0], 'temperature increases': [0, 0, 1, 0], 'viscosity': [0, 0, 1, 0], 'kinetic energy': [0, 0, 4, 7], 'temperature': [0, 1, 1, 7], 'molecules': [0, 0, 1, 1], 'increase': [3, 1, 10, 35]}

Option 1 states both Assertion (A) and Reason (R) are true and R explains A. However, this is not the case as the assertion is incorrect.

Option 2 argues that both the Assertion (A) and Reason (R) are true, but the reason does not explain the assertion. This is also incorrect because the assertion is false.

Option 3 proposes that the Assertion (A) is true but the Reason (R) is false. This is not true because the assertion is incorrect, and the reason is true.

Option 4 suggests the Assertion (A) is false but the Reason (R) is true, which is the correct option. When the temperature increases, the viscosity of glycerine decreases, not increases. Hence, Assertion (A) is false. Reason (R) states that rise of temperature increases kinetic energy of molecules, which is true and a basic concept in physics known as the kinetic theory of gases. Therefore, option 4 is the correct answer.

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