SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The ratio of elements in pure water can change based on where the water is from. Example a spring in Kansas compared to a spring in Europe.
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True
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False
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -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).
Detailed explanation-2: -The ratio of hydrogen and oxygen by mass in water is 1:8. The atomic masses of H and O are 1 g/mol and 16 g/mol respectively. In H2O, the ratio of hydrogen and oxygen by mass will be 2:16=1:8.
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