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Assertion (A): In general, viscosity in liquids increases and ingases it decreases with rise in temperature. Reason (R): Viscosity is caused by inter molecular forces of cohesion and due to transfer of molecular momentum between fluid layers; of which in liquids the former and in gases the later contribute the major part towards viscosity.
- a)Both A and R are individually true and R is the correct explanation ofA
- b)Both Aand Rare individually true but Ris not the correct explanationof A
- c)A is true but R is false
- d)A is false but R is true
Correct answer is option 'D'. Can you explain this answer?
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Assertion (A): In general, viscosity in liquids increases and ingases ...
Viscosity is higher in liquids than gases as the temperature increases. It will certainly change its state to gas and so the viscosity will decrease. The reason is true it is due to the friction between fluid layers.
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Assertion (A): In general, viscosity in liquids increases and ingases ...
D) viscosity is higher in liquids than gases.....as the temperature increases.......it will certainly change its state to gas and so the viscosity will decrease.....the reason is true......it is due to the friction between fluid layers
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Assertion (A): In general, viscosity in liquids increases and ingases ...
Statement: Assertion (A): In general, viscosity in liquids increases and in gases it decreases with rise in temperature.
Reason: Reason (R): Viscosity is caused by intermolecular forces of cohesion and due to transfer of molecular momentum between fluid layers; of which in liquids the former and in gases the latter contribute the major part towards viscosity.
Explanation:
Viscosity is a measure of a fluid's resistance to flow. It is caused by the internal friction between fluid layers as they move past each other. The viscosity of a fluid depends on various factors, including temperature.
Assertion (A): In general, viscosity in liquids increases and in gases it decreases with rise in temperature.
Explanation for Assertion (A):
- In liquids, the intermolecular forces of cohesion play a significant role in determining viscosity. These forces tend to increase with decreasing temperature, making the liquid more resistant to flow. Therefore, as temperature increases, the intermolecular forces weaken, leading to a decrease in viscosity.
- In gases, the viscosity is primarily determined by the transfer of molecular momentum between fluid layers. The molecular momentum transfer increases with increasing temperature due to the increased random motion of molecules. This leads to a decrease in viscosity as temperature rises.
Reason (R): Viscosity is caused by intermolecular forces of cohesion and due to transfer of molecular momentum between fluid layers; of which in liquids the former and in gases the latter contribute the major part towards viscosity.
Explanation for Reason (R):
- In liquids, the intermolecular forces of cohesion, such as hydrogen bonding or Van der Waals forces, contribute significantly to viscosity. These forces result in strong interactions between molecules, leading to higher viscosity.
- In gases, the viscosity is primarily governed by the transfer of molecular momentum between fluid layers. The random motion of molecules in gases leads to collisions and the transfer of momentum between adjacent layers. This momentum transfer contributes to the viscosity of gases.
Conclusion:
- Both Assertion (A) and Reason (R) are individually true.
- However, Reason (R) does not provide the correct explanation for Assertion (A).
- The increase or decrease in viscosity with temperature is determined by different factors in liquids and gases, namely intermolecular forces of cohesion and molecular momentum transfer, respectively.
Reason: Reason (R): Viscosity is caused by intermolecular forces of cohesion and due to transfer of molecular momentum between fluid layers; of which in liquids the former and in gases the latter contribute the major part towards viscosity.
Explanation:
Viscosity is a measure of a fluid's resistance to flow. It is caused by the internal friction between fluid layers as they move past each other. The viscosity of a fluid depends on various factors, including temperature.
Assertion (A): In general, viscosity in liquids increases and in gases it decreases with rise in temperature.
Explanation for Assertion (A):
- In liquids, the intermolecular forces of cohesion play a significant role in determining viscosity. These forces tend to increase with decreasing temperature, making the liquid more resistant to flow. Therefore, as temperature increases, the intermolecular forces weaken, leading to a decrease in viscosity.
- In gases, the viscosity is primarily determined by the transfer of molecular momentum between fluid layers. The molecular momentum transfer increases with increasing temperature due to the increased random motion of molecules. This leads to a decrease in viscosity as temperature rises.
Reason (R): Viscosity is caused by intermolecular forces of cohesion and due to transfer of molecular momentum between fluid layers; of which in liquids the former and in gases the latter contribute the major part towards viscosity.
Explanation for Reason (R):
- In liquids, the intermolecular forces of cohesion, such as hydrogen bonding or Van der Waals forces, contribute significantly to viscosity. These forces result in strong interactions between molecules, leading to higher viscosity.
- In gases, the viscosity is primarily governed by the transfer of molecular momentum between fluid layers. The random motion of molecules in gases leads to collisions and the transfer of momentum between adjacent layers. This momentum transfer contributes to the viscosity of gases.
Conclusion:
- Both Assertion (A) and Reason (R) are individually true.
- However, Reason (R) does not provide the correct explanation for Assertion (A).
- The increase or decrease in viscosity with temperature is determined by different factors in liquids and gases, namely intermolecular forces of cohesion and molecular momentum transfer, respectively.
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Assertion (A): In general, viscosity in liquids increases and ingases it decreases with rise in temperature. Reason (R): Viscosity is caused by inter molecular forces of cohesion and due to transfer of molecular momentum between fluid layers; of which in liquids the former and in gases the later contribute the major part towards viscosity.a)Both A and R are individually true and R is the correct explanation ofAb)Both Aand Rare individually true but Ris not the correct explanationof Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer?
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Assertion (A): In general, viscosity in liquids increases and ingases it decreases with rise in temperature. Reason (R): Viscosity is caused by inter molecular forces of cohesion and due to transfer of molecular momentum between fluid layers; of which in liquids the former and in gases the later contribute the major part towards viscosity.a)Both A and R are individually true and R is the correct explanation ofAb)Both Aand Rare individually true but Ris not the correct explanationof Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Assertion (A): In general, viscosity in liquids increases and ingases it decreases with rise in temperature. Reason (R): Viscosity is caused by inter molecular forces of cohesion and due to transfer of molecular momentum between fluid layers; of which in liquids the former and in gases the later contribute the major part towards viscosity.a)Both A and R are individually true and R is the correct explanation ofAb)Both Aand Rare individually true but Ris not the correct explanationof Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): In general, viscosity in liquids increases and ingases it decreases with rise in temperature. Reason (R): Viscosity is caused by inter molecular forces of cohesion and due to transfer of molecular momentum between fluid layers; of which in liquids the former and in gases the later contribute the major part towards viscosity.a)Both A and R are individually true and R is the correct explanation ofAb)Both Aand Rare individually true but Ris not the correct explanationof Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer?.
Assertion (A): In general, viscosity in liquids increases and ingases it decreases with rise in temperature. Reason (R): Viscosity is caused by inter molecular forces of cohesion and due to transfer of molecular momentum between fluid layers; of which in liquids the former and in gases the later contribute the major part towards viscosity.a)Both A and R are individually true and R is the correct explanation ofAb)Both Aand Rare individually true but Ris not the correct explanationof Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Assertion (A): In general, viscosity in liquids increases and ingases it decreases with rise in temperature. Reason (R): Viscosity is caused by inter molecular forces of cohesion and due to transfer of molecular momentum between fluid layers; of which in liquids the former and in gases the later contribute the major part towards viscosity.a)Both A and R are individually true and R is the correct explanation ofAb)Both Aand Rare individually true but Ris not the correct explanationof Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): In general, viscosity in liquids increases and ingases it decreases with rise in temperature. Reason (R): Viscosity is caused by inter molecular forces of cohesion and due to transfer of molecular momentum between fluid layers; of which in liquids the former and in gases the later contribute the major part towards viscosity.a)Both A and R are individually true and R is the correct explanation ofAb)Both Aand Rare individually true but Ris not the correct explanationof Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Assertion (A): In general, viscosity in liquids increases and ingases it decreases with rise in temperature. Reason (R): Viscosity is caused by inter molecular forces of cohesion and due to transfer of molecular momentum between fluid layers; of which in liquids the former and in gases the later contribute the major part towards viscosity.a)Both A and R are individually true and R is the correct explanation ofAb)Both Aand Rare individually true but Ris not the correct explanationof Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
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ample number of questions to practice Assertion (A): In general, viscosity in liquids increases and ingases it decreases with rise in temperature. Reason (R): Viscosity is caused by inter molecular forces of cohesion and due to transfer of molecular momentum between fluid layers; of which in liquids the former and in gases the later contribute the major part towards viscosity.a)Both A and R are individually true and R is the correct explanation ofAb)Both Aand Rare individually true but Ris not the correct explanationof Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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