Chemistry · PYQ NEET UG 2016(1)

Which of the following statements about hydrogen is INCORRECT?

1. A
   Hydronium ion, \( H_3O^{+} \) exists freely in solution.
2. B
   Hydrogen never acts as cation in ionic salts.
3. C
   Hydrogen has three isotopes of which tritium is the most common.
4. D
   Dihydrogen does not act as a reducing agent.