Assertion: Water molecules always contain hydrogen and oxygen in ratio 1:8.
Reason: Water obeys laws of constant proportions irrespective of source and method of preparation
Mark the correct choice as:
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 the 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.
Answers
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Answer:
option (a)will be the correct answer
Answered by
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The correct choice is a) Both assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of assertion (A).
- The formula of water is H₂O. The mass of H is 1u and that of O is 16u.
- Hence, the ratio of H and O in H₂O by mass = 2 : 16 = 1 : 8.
- This ratio is constant irrespective of the source of water. A water molecule from a river will follow the same ratio as that from a tap.
- This is in accordance with the Law of Constant Proportions.
- Since both the statements are true and the reason explains the assertion, we can say that option (a) is correct.
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