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Assertion (A): pure water obtained from ...

Assertion (A): pure water obtained from different states of india always contains hydrogen and oxygen in the ration of 1:8 by mass.
Reason (R ): Total mass of reactants and products during chemical change is always the same.

A

If both (A) and (R ) are correct and (R ) is the correct explantion for (A)

B

If both (A) and (R ) are correct but (R ) is not the correct explantion for (A)

C

If (A) is correct but (R ) is incorrect.

D

If (A) and (R ) are incorrect.

Text Solution

Verified by Experts

The correct Answer is:
B
Both `(A)` and `(R )` correct statement but `(R )` is not the correct explanation of `(A)`. The correct explanation is based on the law of constant composition.
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This section contains Assertion (A) Pure water obtained from different sources always contains hydrogen and oxygen in the ratio 1:8 by mass. Reason ( R) A chemical compound always contains elements combined together in same proportion by mass.

Assertion: Pure water obtained from different sources such as river, well, spring, sea etc. always contains hydrogen and oxygen combined in the ratio of 1 : 8 by mass. Reason: A chemical compound always contains same elements combined in same fixed proportion by mass.

Knowledge Check

  • Assertion: Pure water obtained from different sources always contains hydrogen and oxygen in the ratio of 1 : 8 by mass. Reason: Molecular mass of water is 18.

    A
    Assertion and reason both are correct statements and reason is correct explanation for assertion.
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    C
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    D
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    If both assertion and reason are true, and reason is the true explanation of the assertion.
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  • In each of the following two questions two statements are given one labelled as the Assertion(A) or Statement I and the other labelled as the reason (R) or statement II. Examine these statements carefully and mark the correct choice as per following instructions Assertion (A) - Pure water obtained from different sources, such as river, well, spring, sea etc. always contains hydrogen and oxygen in ratio of 1:8 by mass Reason (R) - Mass of reactants and products during chemical or physical changes is always constant

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