Class 9 Exam > Class 9 Questions > A mixture of iron filings and sulphur is heat...
Start Learning for Free
A mixture of iron filings and sulphur is heated in a hard boiling tube. Which of the following will be observed?
- a)Iron will melt first
- b)Sulphur will melt first
- c)The mixture becomes red hot without melting
- d)Mixture sublimes
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
A mixture of iron filings and sulphur is heated in a hard boiling tube...
When we start heating a mixture of iron filing and sulphur, the sulphur melts reacting exothermically (that is with the production of heat) with the iron filings to form the compound Iron (II) sulfide. The compound formed has properties that are different from both sulfur and iron. For instance, the compound does not have the magnetic properties of iron, and thus a magnet that could have easily separated iron nails and sulphur initially, will not be able to separate iron and sulphur from Iron (II) sulphide.
Most Upvoted Answer
A mixture of iron filings and sulphur is heated in a hard boiling tube...
Heating a Mixture of Iron Filings and Sulphur
When a mixture of iron filings and sulphur is heated in a hard boiling tube, it is important to understand the physical properties of both substances to predict the outcome.
Physical Properties of Iron and Sulphur
- Iron Filings: Iron has a melting point of approximately 1538°C.
- Sulphur: Sulphur, on the other hand, has a much lower melting point of about 115°C.
Observation During Heating
When the mixture is heated:
- Sulphur will melt first due to its significantly lower melting point compared to iron. As the temperature rises, sulphur will transition from a solid to a liquid state before any noticeable change occurs in the iron.
- The mixture may appear to become red hot, but this is due to the heating of the iron filings, which have not yet melted.
Why Option 'B' is Correct
- Melting Point Comparison: Since sulphur melts at a much lower temperature than iron, it will be the first to undergo a phase change.
- Visual Change: The liquid sulphur can be observed within the mixture, while the iron filings remain solid, leading to the conclusion that sulphur melts first.
Conclusion
Thus, the correct answer is that sulphur will melt first when a mixture of iron filings and sulphur is heated, making option 'B' the right choice.
When a mixture of iron filings and sulphur is heated in a hard boiling tube, it is important to understand the physical properties of both substances to predict the outcome.
Physical Properties of Iron and Sulphur
- Iron Filings: Iron has a melting point of approximately 1538°C.
- Sulphur: Sulphur, on the other hand, has a much lower melting point of about 115°C.
Observation During Heating
When the mixture is heated:
- Sulphur will melt first due to its significantly lower melting point compared to iron. As the temperature rises, sulphur will transition from a solid to a liquid state before any noticeable change occurs in the iron.
- The mixture may appear to become red hot, but this is due to the heating of the iron filings, which have not yet melted.
Why Option 'B' is Correct
- Melting Point Comparison: Since sulphur melts at a much lower temperature than iron, it will be the first to undergo a phase change.
- Visual Change: The liquid sulphur can be observed within the mixture, while the iron filings remain solid, leading to the conclusion that sulphur melts first.
Conclusion
Thus, the correct answer is that sulphur will melt first when a mixture of iron filings and sulphur is heated, making option 'B' the right choice.
Attention Class 9 Students!
To make sure you are not studying endlessly, EduRev has designed Class 9 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 9.
|
Explore Courses for Class 9 exam
|
|
Similar Class 9 Doubts
Top Courses for Class 9View all
A mixture of iron filings and sulphur is heated in a hard boiling tube. Which of the following will be observed?a)Iron will melt firstb)Sulphur will melt firstc)The mixture becomes red hot without meltingd)Mixture sublimesCorrect answer is option 'B'. Can you explain this answer?
Question Description
A mixture of iron filings and sulphur is heated in a hard boiling tube. Which of the following will be observed?a)Iron will melt firstb)Sulphur will melt firstc)The mixture becomes red hot without meltingd)Mixture sublimesCorrect answer is option 'B'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about A mixture of iron filings and sulphur is heated in a hard boiling tube. Which of the following will be observed?a)Iron will melt firstb)Sulphur will melt firstc)The mixture becomes red hot without meltingd)Mixture sublimesCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A mixture of iron filings and sulphur is heated in a hard boiling tube. Which of the following will be observed?a)Iron will melt firstb)Sulphur will melt firstc)The mixture becomes red hot without meltingd)Mixture sublimesCorrect answer is option 'B'. Can you explain this answer?.
A mixture of iron filings and sulphur is heated in a hard boiling tube. Which of the following will be observed?a)Iron will melt firstb)Sulphur will melt firstc)The mixture becomes red hot without meltingd)Mixture sublimesCorrect answer is option 'B'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about A mixture of iron filings and sulphur is heated in a hard boiling tube. Which of the following will be observed?a)Iron will melt firstb)Sulphur will melt firstc)The mixture becomes red hot without meltingd)Mixture sublimesCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A mixture of iron filings and sulphur is heated in a hard boiling tube. Which of the following will be observed?a)Iron will melt firstb)Sulphur will melt firstc)The mixture becomes red hot without meltingd)Mixture sublimesCorrect answer is option 'B'. Can you explain this answer?.
Solutions for A mixture of iron filings and sulphur is heated in a hard boiling tube. Which of the following will be observed?a)Iron will melt firstb)Sulphur will melt firstc)The mixture becomes red hot without meltingd)Mixture sublimesCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 9.
Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free.
Here you can find the meaning of A mixture of iron filings and sulphur is heated in a hard boiling tube. Which of the following will be observed?a)Iron will melt firstb)Sulphur will melt firstc)The mixture becomes red hot without meltingd)Mixture sublimesCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
A mixture of iron filings and sulphur is heated in a hard boiling tube. Which of the following will be observed?a)Iron will melt firstb)Sulphur will melt firstc)The mixture becomes red hot without meltingd)Mixture sublimesCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for A mixture of iron filings and sulphur is heated in a hard boiling tube. Which of the following will be observed?a)Iron will melt firstb)Sulphur will melt firstc)The mixture becomes red hot without meltingd)Mixture sublimesCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of A mixture of iron filings and sulphur is heated in a hard boiling tube. Which of the following will be observed?a)Iron will melt firstb)Sulphur will melt firstc)The mixture becomes red hot without meltingd)Mixture sublimesCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice A mixture of iron filings and sulphur is heated in a hard boiling tube. Which of the following will be observed?a)Iron will melt firstb)Sulphur will melt firstc)The mixture becomes red hot without meltingd)Mixture sublimesCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Class 9 tests.
|
|
Explore Courses for Class 9 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
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup