Elementary Ideas of Quantum Mechanics(Quantum Mechanics, the Quantum Mechanical Model of the Atom, its important features) NEET Questions

Physical Chemistry - Atomic Structure

Elementary Ideas of Quantum Mechanics(Quantum Mechanics, the Quantum Mechanical Model of the Atom, its important features) MCQ Questions


7.
The quantum mechanical model gives the probability of finding an electron in:
A.
Fixed orbit
B.
Definite trajectory
C.
Atomic orbital
D.
Nucleus
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ANSWER :
C. Atomic orbital
8.
The Heisenberg uncertainty principle states that it is impossible to know exactly:

NEET - 2019

A.
Energy and mass of an electron
B.
Position and velocity of an electron
C.
Charge and mass of an electron
D.
Speed and acceleration of an electron
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ANSWER :
B. Position and velocity of an electron
9.
An atomic orbital is:
A.
A circular path
B.
A three-dimensional region
C.
An electron pair
D.
A fixed shell
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ANSWER :
B. A three-dimensional region
10.
Which quantum number is NOT derived from the Schrödinger equation?
A.
Principal (n)
B.
Azimuthal (l)
C.
Magnetic (m)
D.
Spin (s)
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ANSWER :
D. Spin (s)
11.
Which of the following is an important feature of quantum mechanics?
A.
Trajectories of electrons
B.
Definite orbits
C.
Orbitals instead of orbits
D.
Continuous energy levels
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ANSWER :
C. Orbitals instead of orbits
12.
Which scientist first suggested the wave nature of electrons?
A.
Einstein
B.
De Broglie
C.
Bohr
D.
Heisenberg
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ANSWER :
B. De Broglie