Atomic Structure (KVPY Stream-SA (Class 11) Chemistry): Questions 11 - 15 of 30

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Question number: 11

» Atomic Structure » Bohr Model of Hydrogen Atom

Appeared in Year: 2013

MCQ▾

Question

The radii of the first Bohr orbit of H ( rH ), He+ ( rHe+ ) and Li2+ ( rLi2+ ) are in the order

Choices

Choice (4) Response
a.

rH > rHe+ > rLi2+

b.

rHe+ < rH < rLi2+

c.

rHe+ > rH > rLi2+

d.

rH < rHe+ < rLi2+

Question number: 12

» Atomic Structure » Quantum Mechanical Model of Atom

Appeared in Year: 2015

MCQ▾

Question

Maximum number of electrons that can be accommodated in the subshell with azimuthal quantum number l=4 , is

Choices

Choice (4) Response
a.

16

b.

10

c.

18

d.

8

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 4.4×1019J , what is the wavelength of the photon required producing this transition.

Choices

Choice (4) Response
a.

4.517×10 - 7m

b.

8.9×107m

c.

8.9×107m

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

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