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


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–1 respectively. 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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