JEE Main 2019ChemistryHydrogenEasyMCQ

JEE Main 2019 — Hydrogen Question with Solution

JEE Main 2019 (10 Jan Shift 1)

Question

The total number of isotopes of hydrogen and number of radioactive isotopes among them, respectively, are

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Show full solutionCorrect option: C
Correct answer
C3 and 1

Step-by-step explanation

Hydrogen is the first element in the periodic table and has the atomic number one. Those elements which have the same atomic number but a different mass number are called isotopes. There are three isotopes of hydrogen namely, protium H11, deuterium H12 or D and lastly tritium H13 or T. The isotopes are different because of the different number of neutrons present in them.

Isotopes of Hydrogen:



Among all three isotopes only Tritium is radioactive.

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About this question

This is a previous-year question from JEE Main 2019, covering the Hydrogen chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.