Atomic Structure (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Chemistry): Questions 13 - 17 of 30

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Question number: 13

» Atomic Structure » De-Broglie's Relationship

MCQ▾

Question

If the energy difference between the ground state of an atom and its excited state is, what is the wavelength of the photon required producing this transition.

Choices

Choice (4) Response

a.

4.517×10 - 7m

b.

c.

d.

4.517×107m

Question number: 14

» Atomic Structure » Quantum Mechanical Model of Atom

MCQ▾

Question

A particle contains 37 electrons, 37 protons and 50 neutrons. Find the mass deficiency of this atom is the actual calculated mass is found to be 86.909187

(Mass of electron-0.00054858amu)

(Mass of proton-1.0073amu)

(Mass of neutrons-1.0087amu)

Choices

Choice (4) Response

a.

0.657amu/atom

b.

0.234amu/atom

c.

1.54amu/atom

d.

0.816amu/atom

Question number: 15

» Atomic Structure » Nature of Electromagnetic Radiation

Assertion-Reason▾

Assertion (Ꭺ)

Threshold frequency is a characteristic for a metal.

Reason (Ꭱ)

Threshold frequency is a maximum frequency required for the ejection of electron from the metal surface.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are false

Question number: 16

» Atomic Structure » Rules for Filling Electrons in Orbitals

Appeared in Year: 2014

MCQ▾

Question

The order of increasing energies of the orbitals follows-

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 17

» Atomic Structure » Electronic Configuration of Elements

MCQ▾

Question

What is the complete ground state electron configuration for ?

Choices

Choice (4) Response

a.

b.

c.

d.

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