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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 : When 10 g of CaCO3 is decomposed, 5.6 g of residue is left and 4.4 g of CO2 escapes.
Reason : Law of conservation of mass is followed.
  • a)
    Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
  • b)
    Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
  • c)
    Assertion (A) is true but reason (R) is false.
  • d)
    Assertion (A) is false but reason (R) is true.
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Direction : In the following questions, a statement of assertion (A) ...
CaCO3 ​→ CaO + CO2
100 gm 56 gm 44 gm
When 10g of CaCO3 is decomposed, 5.6g of residue is left and 4.4g of CO2 is escapes follows "Law of mass conservation".
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Most Upvoted Answer
Direction : In the following questions, a statement of assertion (A) ...
Assertion : When 10 g of CaCO3 is decomposed, 5.6 g of residue is left and 4.4 g of CO2 escapes.
Reason : Law of conservation of mass is followed.

The correct answer is option 'A', which states that both the assertion and reason are true and the reason is the correct explanation of the assertion.

Explanation:
The assertion states that when 10 g of CaCO3 is decomposed, 5.6 g of residue is left and 4.4 g of CO2 escapes. This means that during the decomposition of CaCO3, a part of it remains as residue and a part of it escapes as CO2 gas.

The reason states that the Law of conservation of mass is followed. This means that the total mass of the reactants must be equal to the total mass of the products in a chemical reaction.

When CaCO3 is decomposed, it undergoes a chemical reaction and forms two products - residue and CO2 gas. The total mass of these products should be equal to the mass of the reactant, which is 10 g of CaCO3.

In this case, 5.6 g of residue is left and 4.4 g of CO2 escapes. The sum of these masses is indeed equal to 10 g, which confirms the Law of conservation of mass.

Therefore, both the assertion and reason are true, and the reason correctly explains why the assertion is true. The Law of conservation of mass is a fundamental principle in chemistry that states that mass is neither created nor destroyed in a chemical reaction, it is only transformed from one form to another.
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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 : When 10 g of CaCO3 is decomposed, 5.6 g of residue is left and 4.4 g of CO2 escapes.Reason : Law of conservation of mass is followed.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'A'. 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 : When 10 g of CaCO3 is decomposed, 5.6 g of residue is left and 4.4 g of CO2 escapes.Reason : Law of conservation of mass is followed.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'A'. 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 : When 10 g of CaCO3 is decomposed, 5.6 g of residue is left and 4.4 g of CO2 escapes.Reason : Law of conservation of mass is followed.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'A'. 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 : When 10 g of CaCO3 is decomposed, 5.6 g of residue is left and 4.4 g of CO2 escapes.Reason : Law of conservation of mass is followed.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'A'. Can you explain this answer?.
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