question_answer

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, \[{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{+}}}\]exists freely in solution

D)   Dihydrogen does not act as a reducing agent