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Which of the following statements about ...

Which of the following statements about hydrogen is incorrect?

A

Hydrogen has three isotopes of which tritium is the most common.

B

Hydrogen never acts as cation in ionic salts.

C

Hydronium ion, `H_(3)O^(+)` exists freely in solution.

D

Dihydrogen acts as a reducing agent

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The correct Answer is:
A
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