MHT CET202619 April 2026Evening ShiftChemistryHydrogenActual
Which of the following statements is false regarding hydrogen ?
Options
- AIt has two isotopes.
- BIn periodic table hydrogen is placed separately above group 1.
- CWhen one electron is lost it forms proton.
- DIt does not exist freely.
Correct answer
A. It has two isotopes.
Step-by-step solution
Hydrogen has three isotopes: Protium ( ¹H ), Deuterium ( ²H ), and Tritium ( ³H ). Thus, the statement that it has two isotopes is false. Hydrogen is placed separately in the periodic table due to its anomalous behavior, resembling both alkali metals and halogens. A hydrogen atom consists of one proton and one electron. When it loses its only electron, it forms an H⁺ ion, which is a bare proton. Atomic hydrogen is highly reactive and does not exist freely in nature; it exists as a diatomic molecule ( H₂ ) or in com