As many as _________ different combination of water are possible from 1H1, 1H2, 1H3 and 8O16, 8O17 and 8O18.
A
12
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B
32
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C
18
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D
15
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Solution
The correct option is A 18
18 different combination of water is possible because each of the two hydrogen atoms in a particular molecule can be same as well as of different isotopes.