JEE PYQ: Hydrogen Question 25
Question 25 - 2019 (10 Jan Shift 1)
The total number of isotopes of hydrogen and number of radioactive isotopes among them, respectively, are:
(a) 3 and 1 (b) 3 and 2 (c) 2 and 1 (d) 2 and 0
Show Answer
Answer: (a)
Solution
There are three isotopes of H out of which only tritium is radioactive, with half life of 12.33 years.