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Assertion: Pure water obtained from diff...

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.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

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The correct Answer is:
A
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Assertion. Pure water obtained from different sources such as sriver, well, spring, sea etc. always contains hydrogen and oxygen in the ratio of 1:8 by mass. Reason. Total mass of reactants and products during chemical or physical change is always the same.

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

Knowledge Check

  • Assertion : Pure water obtained from different sources such as river, well, spring, sea etc. always contains hydrogen and oxygen combined in the ratio 1:8 by mass. Reason : A chemical compound always contains elements combined together in same proportion by mass, it was discovered by French chemist, Joseph Proust (1799).

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of the assertion.
    C
    If assertion is true but reason is false.
    D
    If the assertion and reason both are false.

  • Statement-I : Pure water obtained from different sources such as, river, well, spring, sea etc. always contains hydrogen and oxygen combined in the ratio 1 : 8 by mass. Because Statement-II : A chemical compound always contains elements combined together in same proportion by mass. it wa discovered by French chemist, Joseph Proust (1799) .

    A
    Statement-I is true, Statement-II is true , Statement-II is correct explanation for Statement-I
    B
    Statement-I is true, Statement-II is true , Statement-II is `NOT` a correct explanation for statement-I
    C
    Statement-I is true, Statement-II is false
    D
    Statement-I is false, Statement-II is true

  • 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.

    A
    Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion
    B
    Both Assertion and reason are correct but Reason is not the correct explanation of Assertion
    C
    Assertion is correct but Reason is incorrect.
    D
    Both Assertion and Reason are incorrect

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