JEE Exam > JEE Questions > Given below are two statements. One is labell...
Start Learning for Free
Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Sharp glass edge becomes smooth on heating it up to its melting point.
Reason R: The viscosity of glass decreases on melting.
Choose the most appropriate answer from the options given below.
Assertion A: Sharp glass edge becomes smooth on heating it up to its melting point.
Reason R: The viscosity of glass decreases on melting.
Choose the most appropriate answer from the options given below.
- a)Both A and R are true and R is the correct explanation of A.
- b)A is true, but R is false.
- c)A is false, but R is true.
- d)Both A and R are true, but R is not the correct explanation of A.
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
Given below are two statements. One is labelled asAssertion Aand the o...
Sharp glass edges are heated to make them smooth. On heating, glass melts and the surface of the liquid tends to take the rounded shape at the edges which has minimum surface area. This is called fire polishing of glass.
The viscosity of glass decreases on melting.
Both A and R are true, but R is not the correct explanation of A.
The viscosity of glass decreases on melting.
Both A and R are true, but R is not the correct explanation of A.
Free Test
FREE
| Start Free Test |
Community Answer
Given below are two statements. One is labelled asAssertion Aand the o...
Assertion A: Sharp glass edge becomes smooth on heating it up to its melting point.
Reason R: The viscosity of glass decreases on melting.
Explanation:
When glass is heated to its melting point, it undergoes a phase change from a solid to a liquid state. This phase change is accompanied by an increase in temperature and a decrease in viscosity.
Viscosity of Glass:
Viscosity is a measure of a fluid's resistance to flow. In general, the higher the viscosity, the thicker the fluid and the slower it flows. The viscosity of a material depends on various factors, including temperature and pressure.
In the case of glass, as the temperature increases, the viscosity decreases. This is because the heat energy increases the kinetic energy of the glass molecules, causing them to move more freely and reducing the intermolecular forces that hold them in place.
Sharp Glass Edge:
When glass is melted, it becomes a molten liquid with lower viscosity. The sharp edges of the glass, which were present in the solid state, are now exposed to the molten glass. Due to the decreased viscosity, the molten glass can flow more easily and readily conform to the shape of the surrounding surface.
As a result, the sharp glass edge becomes smooth as it melts and flows, losing its distinct sharpness. This can be observed when heating glass edges, where the initially sharp edge gradually becomes smooth and rounded as it melts.
Conclusion:
Both Assertion A and Reason R are true. The melting of glass reduces its viscosity, allowing it to flow more easily and causing sharp glass edges to become smooth. The reason provided correctly explains the assertion. Hence, option D is the correct answer.
Reason R: The viscosity of glass decreases on melting.
Explanation:
When glass is heated to its melting point, it undergoes a phase change from a solid to a liquid state. This phase change is accompanied by an increase in temperature and a decrease in viscosity.
Viscosity of Glass:
Viscosity is a measure of a fluid's resistance to flow. In general, the higher the viscosity, the thicker the fluid and the slower it flows. The viscosity of a material depends on various factors, including temperature and pressure.
In the case of glass, as the temperature increases, the viscosity decreases. This is because the heat energy increases the kinetic energy of the glass molecules, causing them to move more freely and reducing the intermolecular forces that hold them in place.
Sharp Glass Edge:
When glass is melted, it becomes a molten liquid with lower viscosity. The sharp edges of the glass, which were present in the solid state, are now exposed to the molten glass. Due to the decreased viscosity, the molten glass can flow more easily and readily conform to the shape of the surrounding surface.
As a result, the sharp glass edge becomes smooth as it melts and flows, losing its distinct sharpness. This can be observed when heating glass edges, where the initially sharp edge gradually becomes smooth and rounded as it melts.
Conclusion:
Both Assertion A and Reason R are true. The melting of glass reduces its viscosity, allowing it to flow more easily and causing sharp glass edges to become smooth. The reason provided correctly explains the assertion. Hence, option D is the correct answer.
Attention JEE Students!
To make sure you are not studying endlessly, EduRev has designed JEE study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in JEE.
|
Explore Courses for JEE exam
|
|
Similar JEE Doubts
Top Courses for JEEView all
Given below are two statements. One is labelled asAssertion Aand the other is labelled asReason R.Assertion A:Sharp glass edge becomes smooth on heating it up to its melting point.Reason R:The viscosity of glass decreases on melting.Choose the most appropriate answer from the options given below.a)Both A and R are true and R is the correct explanation of A.b)A is true, but R is false.c)A is false, but R is true.d)Both A and R are true, but R is not the correct explanation of A.Correct answer is option 'D'. Can you explain this answer?
Question Description
Given below are two statements. One is labelled asAssertion Aand the other is labelled asReason R.Assertion A:Sharp glass edge becomes smooth on heating it up to its melting point.Reason R:The viscosity of glass decreases on melting.Choose the most appropriate answer from the options given below.a)Both A and R are true and R is the correct explanation of A.b)A is true, but R is false.c)A is false, but R is true.d)Both A and R are true, but R is not the correct explanation of A.Correct answer is option 'D'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Given below are two statements. One is labelled asAssertion Aand the other is labelled asReason R.Assertion A:Sharp glass edge becomes smooth on heating it up to its melting point.Reason R:The viscosity of glass decreases on melting.Choose the most appropriate answer from the options given below.a)Both A and R are true and R is the correct explanation of A.b)A is true, but R is false.c)A is false, but R is true.d)Both A and R are true, but R is not the correct explanation of A.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Given below are two statements. One is labelled asAssertion Aand the other is labelled asReason R.Assertion A:Sharp glass edge becomes smooth on heating it up to its melting point.Reason R:The viscosity of glass decreases on melting.Choose the most appropriate answer from the options given below.a)Both A and R are true and R is the correct explanation of A.b)A is true, but R is false.c)A is false, but R is true.d)Both A and R are true, but R is not the correct explanation of A.Correct answer is option 'D'. Can you explain this answer?.
Given below are two statements. One is labelled asAssertion Aand the other is labelled asReason R.Assertion A:Sharp glass edge becomes smooth on heating it up to its melting point.Reason R:The viscosity of glass decreases on melting.Choose the most appropriate answer from the options given below.a)Both A and R are true and R is the correct explanation of A.b)A is true, but R is false.c)A is false, but R is true.d)Both A and R are true, but R is not the correct explanation of A.Correct answer is option 'D'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Given below are two statements. One is labelled asAssertion Aand the other is labelled asReason R.Assertion A:Sharp glass edge becomes smooth on heating it up to its melting point.Reason R:The viscosity of glass decreases on melting.Choose the most appropriate answer from the options given below.a)Both A and R are true and R is the correct explanation of A.b)A is true, but R is false.c)A is false, but R is true.d)Both A and R are true, but R is not the correct explanation of A.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Given below are two statements. One is labelled asAssertion Aand the other is labelled asReason R.Assertion A:Sharp glass edge becomes smooth on heating it up to its melting point.Reason R:The viscosity of glass decreases on melting.Choose the most appropriate answer from the options given below.a)Both A and R are true and R is the correct explanation of A.b)A is true, but R is false.c)A is false, but R is true.d)Both A and R are true, but R is not the correct explanation of A.Correct answer is option 'D'. Can you explain this answer?.
Solutions for Given below are two statements. One is labelled asAssertion Aand the other is labelled asReason R.Assertion A:Sharp glass edge becomes smooth on heating it up to its melting point.Reason R:The viscosity of glass decreases on melting.Choose the most appropriate answer from the options given below.a)Both A and R are true and R is the correct explanation of A.b)A is true, but R is false.c)A is false, but R is true.d)Both A and R are true, but R is not the correct explanation of A.Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for JEE.
Download more important topics, notes, lectures and mock test series for JEE Exam by signing up for free.
Here you can find the meaning of Given below are two statements. One is labelled asAssertion Aand the other is labelled asReason R.Assertion A:Sharp glass edge becomes smooth on heating it up to its melting point.Reason R:The viscosity of glass decreases on melting.Choose the most appropriate answer from the options given below.a)Both A and R are true and R is the correct explanation of A.b)A is true, but R is false.c)A is false, but R is true.d)Both A and R are true, but R is not the correct explanation of A.Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Given below are two statements. One is labelled asAssertion Aand the other is labelled asReason R.Assertion A:Sharp glass edge becomes smooth on heating it up to its melting point.Reason R:The viscosity of glass decreases on melting.Choose the most appropriate answer from the options given below.a)Both A and R are true and R is the correct explanation of A.b)A is true, but R is false.c)A is false, but R is true.d)Both A and R are true, but R is not the correct explanation of A.Correct answer is option 'D'. Can you explain this answer?, a detailed solution for Given below are two statements. One is labelled asAssertion Aand the other is labelled asReason R.Assertion A:Sharp glass edge becomes smooth on heating it up to its melting point.Reason R:The viscosity of glass decreases on melting.Choose the most appropriate answer from the options given below.a)Both A and R are true and R is the correct explanation of A.b)A is true, but R is false.c)A is false, but R is true.d)Both A and R are true, but R is not the correct explanation of A.Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of Given below are two statements. One is labelled asAssertion Aand the other is labelled asReason R.Assertion A:Sharp glass edge becomes smooth on heating it up to its melting point.Reason R:The viscosity of glass decreases on melting.Choose the most appropriate answer from the options given below.a)Both A and R are true and R is the correct explanation of A.b)A is true, but R is false.c)A is false, but R is true.d)Both A and R are true, but R is not the correct explanation of A.Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Given below are two statements. One is labelled asAssertion Aand the other is labelled asReason R.Assertion A:Sharp glass edge becomes smooth on heating it up to its melting point.Reason R:The viscosity of glass decreases on melting.Choose the most appropriate answer from the options given below.a)Both A and R are true and R is the correct explanation of A.b)A is true, but R is false.c)A is false, but R is true.d)Both A and R are true, but R is not the correct explanation of A.Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice JEE tests.
|
|
Explore Courses for JEE exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup