Atomic Structure (KVPY Stream-SA (Class 11) Chemistry): Questions 20 - 25 of 30

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Question number: 20

» Atomic Structure » Bohr Model of Hydrogen Atom

MCQ▾

Question

Find out the number of waves made by a Bohr electron in one complete revolution in its third orbit.

Choices

Choice (4) Response

a.

λ

b.

2 λ

c.

12 λ

d.

3 λ

Question number: 21

» Atomic Structure » Bohr Model of Hydrogen Atom

Appeared in Year: 2014

MCQ▾

Question

The radii of the first Bohr orbit of O ( rO ), F ( rF ) and Ne ( rNe ) are in the order

Choices

Choice (4) Response

a.

rO > rF > rNe

b.

rO < rNe < rF

c.

rF > rO > rNe

d.

rNe < rF < rO

Question number: 22

» Atomic Structure » Thomson and Rutherford Atomic Models

MCQ▾

Question

Who discovered electron and neutron?

Choices

Choice (4) Response

a.

Chadwick and J. J. Thomson

b.

E. Goldstein and J. J. Thomson

c.

J. J. Thomson and Chadwick

d.

J. J. Thomson and E. Goldstein

Question number: 23

» Atomic Structure » Quantum Mechanical Model of Atom

MCQ▾

Question

Which of the following set of quantum numbers are permitted?

Choices

Choice (4) Response

a.

n = 3, = 2, m =-2, s =+1/2

b.

n = 2, =2, m =+l, s = -1/2

c.

n = 3, ℓ = 2, m =-l, s = 0

d.

n = 2, = 3, m =+l, s =- 1/2

Question number: 24

» Atomic Structure » Nature of Electromagnetic Radiation

Assertion-Reason▾

Assertion (Ꭺ)

Splitting of the spectral lines in the presence of magnetic field known as stark effect.

Reason (Ꭱ)

Line spectrum is simplest for hydrogen atom.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 25

» Atomic Structure » De-Broglie's Relationship

Appeared in Year: 2014

MCQ▾

Question

If the Planck’s constant h = 6.6×1034 Js, the de-Broglie wavelength of a particle having momentum of 3.3×1024 kg. m. s-1 will be -

Choices

Choice (4) Response

a.

0.2 Å

b.

0.02 Å

c.

0.002 Å

d.

2 Å

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