# 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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