Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
BITSAT 2024Paper 2
Exam
BITSAT
Year
2024
Paper
Paper 2
Subject
Chemistry
Chapter
Structure of Atom

BITSAT 2024 · Paper 2 · Chemistry · Structure of Atom

The energy of second orbit of hydrogen atom is -5.45 × 10^ -19 J ....

The energy of second orbit of hydrogen atom is −5.45×10−19J-5.45 \times 10^{-19} \mathrm{ J}. What is the energy of first orbit of Li2+\mathrm{Li}^{2+} ion (in J)) ?

Options

  1. A−1.962×10−18-1.962 \times 10^{-18}
  2. B−1.962×10−17-1.962 \times 10^{-17}
  3. C−3.924×10−17-3.924 \times 10^{-17}
  4. D−3.924×10−18-3.924 \times 10^{-18}

Correct answer

B. −1.962×10−17-1.962 \times 10^{-17}

Step-by-step solution

En=−13.6[z2n2]eV⇒E1=−13.6[3212]eV=−122.4eV=−122.4×1.602×10−19J=−1.962×10−17JE_n=-13.6\left[\frac{z^2}{n^2}\right] e V\Rightarrow \quad E_1=-13.6\left[\frac{3^2}{1^2}\right] \mathrm{eV}=-122.4 \mathrm{eV}=-122.4 \times 1.602 \times 10^{-19} \mathrm{ J}=-1.962 \times 10^{-17} \mathrm{ J}
Practice Structure of Atom on Quantrex Academy →

More from Structure of Atom

The degeneracy of hydrogen atom that has energy equal to -R_ H 9 is (where, R_ H =… BITSAT 2024If the de-broglie wavelength of a particle of mass (m) is 100 times its velocity. Then… BITSAT 2024A photon of wavelength 3000 Ã… strikes a metal surface. The work function of the metal is… BITSAT 2024A stream of electrons from a heated filament was passed between two charged plates kept… BITSAT 2024Observe the given boundary surface diagrams of two orbitals I and II and choose the… BITSAT 2023If the radius of the 3 rd Bohr's orbit of hydrogen atom is r_3 and the radius of 4^ th… BITSAT 2023The Bohr orbit radius for the hydrogen atom (n=1) is approximately 0.530 Å . The radius… BITSAT 2023The probability density plots of 1 s and 2 s orbitals are given in figure. The density of… BITSAT 2023 Full Structure of Atom list All BITSAT PYQs