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Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion: Elements and compounds are pure substances.
Reason: Properties of compounds are different from those of its constituent elements.
  • a)
    Both (A) and (R) are true, and (R) is the correct explanation of (A).
  • b)
    Both (A) and (R) are true, but (R) is not the correct explanation of (A).
  • c)
    (A) is true, but (R) is false.
  • d)
    (A) is false, but (R) is true.
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Direction: In the following questions, a statement of Assertion (A) i...
A pure substance may either contain constituent particles of only one kind or of different kinds. A pure substance has a fixed composition. Thus, elements and compounds are example of pure substances. Properties of compounds are different from those of its constituent elements.
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Most Upvoted Answer
Direction: In the following questions, a statement of Assertion (A) i...
Assertion: Elements and compounds are pure substances.
Reason: Properties of compounds are different from those of its constituent elements.

The correct answer is option B, which means that both the assertion and the reason are true, but the reason is not the correct explanation of the assertion.

Explanation:
What are elements and compounds?
- Elements: Elements are pure substances that cannot be broken down into simpler substances by any chemical or physical means. They are composed of only one type of atom.
- Compounds: Compounds are pure substances that are composed of two or more elements chemically combined in fixed proportions. They can be broken down into their constituent elements by chemical reactions.

Properties of Elements and Compounds:
- Elements and compounds are both considered pure substances because they have a definite and constant composition.
- However, the properties of compounds are different from those of their constituent elements. When elements combine to form compounds, the resulting compound often has different properties than the individual elements.
- For example, sodium (Na) is a highly reactive metal and chlorine (Cl) is a toxic gas. But when sodium and chlorine combine to form sodium chloride (NaCl), which is a compound, the compound has different properties. Sodium chloride is a white crystalline solid that is commonly known as table salt and is safe for consumption.

Explanation of the Reason:
The reason stated in the question is not a correct explanation of the assertion. It simply states that the properties of compounds are different from those of its constituent elements, which is true. However, it does not explain why elements and compounds are considered pure substances.

Conclusion:
In conclusion, both the assertion and the reason are true. Elements and compounds are indeed pure substances, but the reason provided does not explain why they are considered pure substances.
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Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion: Elements and compounds are pure substances.Reason: Properties of compounds are different from those of its constituent elements.a)Both (A) and (R) are true, and (R) is the correct explanation of (A).b)Both (A) and (R) are true, but (R) is not the correct explanation of (A).c)(A) is true, but (R) is false.d)(A) is false, but (R) is true.Correct answer is option 'B'. Can you explain this answer?
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Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion: Elements and compounds are pure substances.Reason: Properties of compounds are different from those of its constituent elements.a)Both (A) and (R) are true, and (R) is the correct explanation of (A).b)Both (A) and (R) are true, but (R) is not the correct explanation of (A).c)(A) is true, but (R) is false.d)(A) is false, but (R) is true.Correct 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 Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion: Elements and compounds are pure substances.Reason: Properties of compounds are different from those of its constituent elements.a)Both (A) and (R) are true, and (R) is the correct explanation of (A).b)Both (A) and (R) are true, but (R) is not the correct explanation of (A).c)(A) is true, but (R) is false.d)(A) is false, but (R) is true.Correct 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 Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion: Elements and compounds are pure substances.Reason: Properties of compounds are different from those of its constituent elements.a)Both (A) and (R) are true, and (R) is the correct explanation of (A).b)Both (A) and (R) are true, but (R) is not the correct explanation of (A).c)(A) is true, but (R) is false.d)(A) is false, but (R) is true.Correct answer is option 'B'. Can you explain this answer?.
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