JEE Main 2020 — d and f Block Elements Question with Solution
JEE Main 2020 (08 Jan Shift 2)
Question
Hydrogen has three isotopes and If the number of neutron(s) in and respectively, are and the sum of and is
Choose an option
Show full solutionCorrect option: A
Correct answer
A
Step-by-step explanation
Hydrogen has three isotopes
Hence, the sum of neutrons are
| Isotopes | Number of neutrons |
| Protium | |
| Deutrium | |
| Tritium |
Hence, the sum of neutrons are
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the d and f Block Elements chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2020, covering the d and f Block Elements 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.