Chapterwise/Topicwise Daily Practice Problems (DPP) Optics and Modern Physics NEET>Chapter 4 - Atoms>TOPICWISE QUESTIONS>Q 19

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Let $L_{n}$ be the orbital angular momentum and $r_{n}$ be the radius of the electron in the $n^{t h}$ orbit in Bohr model of hydrogen atom. Then,

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Important Questions on Atoms

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Chapterwise/Topicwise Daily Practice Problems (DPP) Optics and Modern Physics NEET>Chapter 4 - Atoms>TOPICWISE QUESTIONS>Q 20

The angular momentum of an electron in first orbit of

{Li}^{+ +}

ion is:

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Chapterwise/Topicwise Daily Practice Problems (DPP) Optics and Modern Physics NEET>Chapter 4 - Atoms>TOPICWISE QUESTIONS>Q 21

An electron makes a transition from

n = 2

to

n = 1

state in a hydrogen like atom. Then,

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Chapterwise/Topicwise Daily Practice Problems (DPP) Optics and Modern Physics NEET>Chapter 4 - Atoms>TOPICWISE QUESTIONS>Q 22

If in the first orbit of a hydrogen atom, the total energy of the electron is

- 21.76 \times 10^{- 19} J

, then its electric potential energy will be:

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Chapterwise/Topicwise Daily Practice Problems (DPP) Optics and Modern Physics NEET>Chapter 4 - Atoms>TOPICWISE QUESTIONS>Q 23

If

13.6 eV

energy is required to ionize the hydrogen atom, then the energy required to remove an electron from

n = 2

is:

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Chapterwise/Topicwise Daily Practice Problems (DPP) Optics and Modern Physics NEET>Chapter 4 - Atoms>TOPICWISE QUESTIONS>Q 24

An energy of

24.6 eV

is required to remove one of the electrons from a neutral helium atom. The energy (in

eV

) required to remove both the electrons from a neutral helium atom is:

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Chapterwise/Topicwise Daily Practice Problems (DPP) Optics and Modern Physics NEET>Chapter 4 - Atoms>TOPICWISE QUESTIONS>Q 25

For a doubly ionised

Li

atom, choose the incorrect option:

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Chapterwise/Topicwise Daily Practice Problems (DPP) Optics and Modern Physics NEET>Chapter 4 - Atoms>TOPICWISE QUESTIONS>Q 26

When an electron in a hydrogen atom is excited from ground state to first excited state, then which of the following is incorrect?

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Chapterwise/Topicwise Daily Practice Problems (DPP) Optics and Modern Physics NEET>Chapter 4 - Atoms>TOPICWISE QUESTIONS>Q 27

Suppose the potential energy between electron and proton at a distance $r$ is given by

- \frac{k e^{2}}{3 r^{3}}

. Application of Bohr's theory to hydrogen atom in this case shows that: