Atomic Structure-Bohr Model of Hydrogen Atom (KVPY Stream-SA (Class 11) Chemistry): Questions 1 - 4 of 4

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Question number: 1

» Atomic Structure » Bohr Model of Hydrogen Atom

MCQ▾

Question

According to Bohr’s theory, the electronic energy of the hydrogen atom in nth Bohr’s orbit given by En=21.76×1019z2n2J . Calculate the longest wavelength of light that will be needed to remove electrons from 3rd Bohr orbit of He+ ion.

Choices

Choice (4) Response

a.

2.06×1018J

b.

2.76×10 - 18J

c.

9.67×1019J

d.

7.79×1016J

Question number: 2

» 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: 3

» 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: 4

» 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

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