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Which of the following statement is always true when a substance undergoes physical change
- a)It changes colour
- b)a new substance is formed
- c)It boil
- d)Its composition remains the same
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
Which of the following statement is always true when a substance under...
Explanation:
When a substance undergoes a physical change, its composition remains the same. This means that the substance remains chemically unchanged and the same substance can be isolated after the physical change. Physical changes involve a change in the state of matter, size, shape or appearance of the substance without any change in its chemical composition. Examples of physical changes include melting, freezing, boiling, condensation, sublimation, cutting, grinding etc.
Examples:
Conclusion:
Therefore, it can be concluded that the statement "Its composition remains the same" is always true when a substance undergoes physical changes.
When a substance undergoes a physical change, its composition remains the same. This means that the substance remains chemically unchanged and the same substance can be isolated after the physical change. Physical changes involve a change in the state of matter, size, shape or appearance of the substance without any change in its chemical composition. Examples of physical changes include melting, freezing, boiling, condensation, sublimation, cutting, grinding etc.
Examples:
- When ice (solid water) melts, it forms liquid water. The composition of the substance remains the same, only the state of matter has changed.
- When a piece of paper is cut into smaller pieces, its shape and size change but it is still paper with the same chemical composition.
- When water is boiled, it forms steam (water vapour). Again, only the state of matter has changed and the chemical composition remains the same.
Conclusion:
Therefore, it can be concluded that the statement "Its composition remains the same" is always true when a substance undergoes physical changes.
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Community Answer
Which of the following statement is always true when a substance under...
Answer: Hey this might help you!
A change in which a substance changes its physical properties like appearance, texture, colour, odour, melting points, boiling points, density, solubility, polarity etc... are called physical changes.
Physical properties can be observed or measured without changing the composition of matter. They are used to observe and describe matter
A change in which a substance changes its physical properties like appearance, texture, colour, odour, melting points, boiling points, density, solubility, polarity etc... are called physical changes.
Physical properties can be observed or measured without changing the composition of matter. They are used to observe and describe matter
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Which of the following statement is always true when a substance undergoes physical changea)It changes colourb)a new substance is formedc)It boild)Its composition remains the sameCorrect answer is option 'D'. Can you explain this answer?
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