Chemistry · 2025
JEE Main · 22 January 2025, Shift 1 · Q51
Radius of the first excited state of Helium ion is given as: a_0 → radius of first stationary state of hydrogen atom.
Radius of the first excited state of Helium ion is given as : $\displaystyle \mathrm{a}_0 \rightarrow$ radius of first stationary state of hydrogen atom.
Official answer
From NTA’s final answer key for this paper.
(2)
$\displaystyle \mathrm{r}=2 \mathrm{a}_0$
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JEE Main 2025 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.