Chemistry · 2022
JEE Main · 29 July 2022, Shift 1 · Q83
The minimum uncertainty in the speed of an electron in an one dimensional region of length 2 a_o (Where a_o = Bohr radius 52.9 pm ) is \ \ \ \ km…
The minimum uncertainty in the speed of an electron in an one dimensional region of length $\displaystyle 2 \mathrm{a}_{\mathrm{o}}$ (Where $\displaystyle \mathrm{a}_{\mathrm{o}}=$ Bohr radius $\displaystyle 52.9$ pm ) is \_\_\_\_ $\displaystyle \mathrm{km} \mathrm{s}^{-1}$.
(Given : Mass of electron $\displaystyle =9.1 \times 10^{-31} \mathrm{~kg}$, Planck's constant $\displaystyle \mathrm{h}=6.63 \times 10^{-34} \mathrm{Js}$ )
Official answer
548
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JEE Main 2022 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.