Structure of Atom | Atomic Structure: MCQs | Question – Paper 3


Topic: Structure of Atom, Test No.: 03, Total MCQs: 10

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Question 1
a-particles, b-particles and g-rays are all having same energy. Their penetrating power in a given medium in increasing order will be [NEET 2013]
A
b, g, a
B
g, a, b
C
a, b, g
D
b, a, g
Question 2
Which of the following is correct?
A
1H1 and 2He3 are isotopes
B
6C14 and 7N14 are isotopes
C
19K39 and 20Ca40 are isotones
D
9F19 and 11Na24 are isodiaphers
Question 3
Which of the following is not permissible?
A
n = 4, l = 3, m = 0
B
n = 4, l = 2, m = 1
C
n = 4, l = 4, m = 1
D
n = 4, l = 0, m = 0
Question 4
Which of the following pair of ions have same paramagnetic moment?
A
Cu+2, Ti+3
B
Mn+2, Cu+2
C
Ti+4, Cu+2
D
Ti+3, Ni+2
Question 5
Which of the following statements does not form a part of Bohr's model of hydrogen atom?
A
Energy of the electrons in the orbit is quantised
B
The electron in the orbit nearest the nucleus has the lowest energy
C
Electrons revolve in different orbits around the nucleus
D
The position and velocity of the electrons in the orbit cannot be determined simultaneously
Question 6
Which one of the following expressions represent the electron probability function
A
4pr dry2
B
4pr2 dry
C
4pr2 dry2
D
4pr dry
Question 7
Which one of the following has unit positive charge and 1 amu mass?
A
Electron
B
Neutron
C
Proton
D
None of these
Question 8
Which one of the following statement is not correct?
A
Rydberg's constant and wave number have same units
B
Lyman series of hydrogen spectrum occur in the ultraviolet region
C
The angular momentum of the electron in the ground state hydrogen atom is equal to h/2p
D
The radius of first Bohr orbit of hydrogen atom is 2.116 × 10–8 cm.
Question 9
Which one of the followings sets of quantum numbers represents the highest energy level in an atom?
A
n = 4, l = 0, m = 0, s = + 1/2
B
n = 3, l = 1, m = 1, s = + 1/2
C
n = 3, l = 2, m = -2, s = + 1/2
D
n = 3, l = 0, m = 0, s = + 1/2
Question 10
Which transition in the hydrogen atomic spectrum will have the same wavelength as the transition, n = 4 to n = 2 of He+ spectrum?
A
n = 4 to n = 3
B
n = 3 to n = 2
C
n = 4 to n = 2
D
n = 2 to n = 1
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