Question:
Which of the following statements about hydrogen are correct?
(i) Hydrogen has three isotopes of which protium is the most common.
(ii) Hydrogen never acts as a cation in ionic salts.
(iii) The hydrogen ion, H+, exists freely in solution.
(iv) Dihydrogen does not act as a reducing agent.
Solution:
Option (i) and (ii) are the answers.
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