Which of the following statements about hydrogen is incorrect?

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Hydronium ion, H3O+exists freely in solution.

Dihydrogen does not act as a reducing agent.

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

Hydrogen never acts as cation in ionic salts.

answer is B.

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Detailed Solution

Dihydrogen acts as a powerful reducing agent and reduces metal oxides such as CuO,ZnO,PbO and Fe3O4 to their respective metals.CuO+H2⟶Cu+H2OZnO+H2⟶Zn+H2OFe3O4+4H2⟶3Fe+4H2OHydrogen has three isotopes of which protium is the most common and tritium is radioactive. therefore third option can also be the answer

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