Structure of Atom | Atomic Structure: MCQs

Topic: Structure of Atom, Test No.: 08, Total MCQs: 10

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Question 1

The value of Planck's constant is 6.63 × 10^–34 Js. The speed of light is 3 × 10¹⁷ nm s^–1. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of 6 × 10¹⁵ s^–1? [NEET 2013]

A	25
B	50
C	75
D	10

Question 2

The values of four quantum numbers of valence electron of an element are
n = 4, l = 0, m = 0 and s = . The element is

A	K
B	Ti
C	Na
D	Sc

Question 3

The velocities of two particles A and B are 0.05 and 0.02 ms^–1respectively. The mass of B is five times the mass of A. The ratio of their de-Broglie's wavelength

A	2:1
B	1:4
C	1:1
D	4:1

Question 4

The wavelength (in Å) of an emission line obtained for Li²⁺ during electronic transition from n₂ = 2 to n₁= 1 is (R = Rydberg constant)

A	4/3R
B	27R/4
C	3R/4
D	4/27R

Question 5

The wavelength associated with a golf ball weighing 200 g and moving at a speed of 5 m/hour is of the order of:

A	10^–10 m
B	10^–20 m
C	10^–30 m
D	10^–40 m

Question 6

The wavelength of a spectral line emitted by hydrogen atom in the Lyman series is cm. What is the value of n₂(R = Rydberg constant)

A	2
B	3
C	4
D	1

Question 7

The wavelengths of electron waves in two orbits is 3 : 5. The ratio of kinetic energy of electron will be

A	25 : 9
B	5 : 3
C	9 : 25
D	3 : 5

Question 8

What is the correct order of spin only magnetic moment (in BM) of Mn⁺² and V⁺² is

A	Mn²⁺ > V ²⁺ > Cr²⁺
B	V ²⁺ > Cr²⁺ > Mn²⁺
C	Mn²⁺ > Cr²⁺ > V 2⁺
D	Cr²⁺ > V ²⁺ > Mn²⁺

Question 9

The H-spectrum show

A	Heisenberg's uncertainty principle
B	diffraction
C	polarisation
D	presence of quantised energy level

Question 10

The maximum number of sub-levels, orbitals and electrons is 'N' shell of an atom are respectively

A	4, 12, 32
B	4, 16, 30
C	4, 16, 32
D	4, 32, 64

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Structure of Atom | Atomic Structure: MCQs | Question – Paper 8

Topic: Structure of Atom, Test No.: 08, Total MCQs: 10

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