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Chemistry · PYQ NEET UG 2016(1)

हिन्दी

Which of the following statements about hydrogen is INCORRECT?

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

Correct answer · Option 3

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

Explanation

Protium (\( ^1H \)) is the most common isotope of hydrogen (abundance ~99.98%), making statement (A) incorrect.
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