NEET Solved Paper 2016 Question 8

Question: Which of the following statements about hydrogen is incorrect?

Options:

A) hydrogen has three isotopes of which tritium is the most common.

B) Hydrogen never acts as cation in ionic salts

C) Hydronium ion, $ {H_3}{O^{+}} $ exists freely in solution

D) Dihydrogen does not act as a reducing agent

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Answer:

Correct Answer: A

Solution:

Hydrogen has three isotopes of which protium $(^1 _1H)$is the most common.

The percent abundance of protium, deuterium and tritium are 99.985, 0.0156 and $10^{−15}$ respectively.