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Anomalous Expansion of Water

1.Pure water ...

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1.Pure water obtained from river, sea, well etc. always contains hydrogen and oxygen in ratio (by mass) of? explanation required.

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Q. Assertion :Pure water obtained from different sources such as river, well, spring, sea etc. always contain 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).

Assertion (A): Pure water obtained from different sources such as a river, well, spring, the sea always contains hydrogen and oxygen in the ratio of 1:8 by mass.

Reason (R): The total mass of reactants and products during chemical or physical change is always the same.

Q. Assertion :Pure water obtained from different states of India always contains hydrogen and oxygen in the ratio of

1 : 8

by mass. Reason: The total mass of reactants and products during chemical change is always the same.

Q. If water samples taken from the sea, rivers, lakes or snow-capped mountains, are found to contain hydrogen and oxygen in the ratio of

1 : 8

. This demonstrates:

In water, the mass ratio of hydrogen to oxygen is always 1:8.

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