# Atoms CBSE Class 12 Physics MCQ Questions with Answer Keys Solutions

If you are preparing for CBSE Class 12 Board Exam Term 1 which will be an objective type questions paper, then you need to practice multiple choice questions of Class 12 Physics Chapterwise. In this article of AKVTutorials, you will get Atoms CBSE Class 12 Physics MCQ Questions with Answer Keys Solutions .

MCQ Questions for Class 12 Physics Atoms Question No 11:

The angular momentum of the electron in the nth allowed orbit is

Option A : ph / 2π

Option B : h / π

Option C : 2h / π

Option D : nh / 2π

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Option D : nh / 2π

MCQ Questions for Class 12 Physics Atoms Question No 12:

Kinetic energy of electron in hydrogen atom is

Option A : e 2/ 4πε0r

Option B : e 2/ 8πε0r

Option C : e 3/ 8πε0r

Option D : e 2/ 3πε0r

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Option B : e 2/ 8πε0r

MCQ Questions for Class 12 Physics Atoms Question No 13:

What is the order of velocity of electron in a hydrogen at

Option A : 10ms-1

Option B : 102 ms-1

Option C : 1010 ms-1

Option D : 109 ms-1

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Option A : 10ms-1

MCQ Questions for Class 12 Physics Atoms Question No 14:

The minimum energy required to knock an e-completely

Option A : Kinetic energy

Option B : Potential energy

Option C : Ionisation energy

Option D : Excitation energy

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Option C : Ionisation energy

MCQ Questions for Class 12 Physics Atoms Question No 15:

In Bohr model of the hydrogen atom, the lowest orbit corresponds to

Option A : Infinite energy

Option B : The maximum energy

Option C : The minimum energy

Option D : Zero energy

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Option C : The minimum energy

MCQ Questions for Class 12 Physics Atoms Question No 16:

An electron in then n=1 orbit of hydrogen atom is bound by 13.6 eV. If a hydrogen atom is in then n=3 state, how much energy is required

Option A : 13.6 eV

Option B : 4.53 eV

Option C : 3.4 eV

Option D : 1.51 eV

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Option D : 1.51 eV

MCQ Questions for Class 12 Physics Atoms Question No 17:

If an electron jumps from 1st orbit to 3rd orbital, then it will

Option A : Absorb energy

Option B : Release energy

Option C : No change of energy

Option D : None of these

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Option A : Absorb energy

MCQ Questions for Class 12 Physics Atoms Question No 18:

Which one of these is non-divisible?

Option A : Nucleus

Option B : Photon

Option C : Proton

Option D : Atom

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Option B : Photon

MCQ Questions for Class 12 Physics Atoms Question No 19:

To explain his theory, Bohr used

Option A : Conservation of linear momentum

Option B : Conservation of angular momentum

Option C : Conservation of quantum frequency

Option D : Conservation of energy

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Option B : Conservation of angular momentum

MCQ Questions for Class 12 Physics Atoms Question No 20:

Hydrogen atoms are excited from ground state of principal quantum number 4. Then the number of spectral lines observed will be:

Option A : 3

Option B : 6

Option C : 5

Option D : 8

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Option B : 6

CBSE Class 12 Physics Chapterwise MCQ
1 : Electric Charge & Fields MCQs
| 1 to 10 | 11 to 20
2 : Electrostatics Potential and Capacitance MCQs
| 1 to 10 | 11 to 20
3 : Current Electricity MCQs
| 1 to 10 | 11 to 20
4 : Moving charges and Magnetism MCQs
| 1 to 10 | 11 to 20
5 : Magnetism and Matter MCQs
| 1 to 10 | 11 to 20
6 : Electromagnetic Induction MCQs
| 1 to 10 | 11 to 20
7 : Alternating Current MCQs
| 1 to 10 | 11 to 20
8 : Electromagnetic Waves MCQs
| 1 to 10 | 11 to 20
9 : Ray Optics and Optical Instruments MCQs
| 1 to 10 | 11 to 20
10 : Wave Optics MCQs
| 1 to 10 | 11 to 20
11 : Dual Nature of Radiation MCQs
| 1 to 10 | 11 to 20
12 : Atoms MCQs
| 1 to 10 | 11 to 20
13 : Nuclei MCQs
| 1 to 10 | 11 to 20
14 : Semi Conductor Electronics MCQs
| 1 to 10 | 11 to 20
15 : Communication Systems MCQs
| 1 to 10 | 11 to 20