question_answer 62)

  Which of the following statements about hydrogen are correct? (a) Hydrogen has three isotopes of which protium is most common. (b) Hydrogen never acts as cation in ionic salts. (c) Hydrogen ion,\[{{H}^{+}}\], exists freely in solution. (d) Dihydrogen does not act as a reducing agent.

Answer:

  (a, b) Hydrogen has three isotopes. In salts i.e., in metal hydrides, hydrogen lies in (-1) state.