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


1.
Quantum mechanics is a theoretical science that deals with the study of motions of:
A.
Only objects moving at the speed of light
B.
Only subatomic particles with particle-like properties
C.
Microscopic objects having both observable wave-like and particle-like properties
D.
Only macroscopic objects with wave-like properties
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ANSWER :
C. Microscopic objects having both observable wave-like and particle-like properties
2.
The fundamental equation of quantum mechanics was developed by:
A.
Niels Bohr in 1913
B.
Erwin Schrödinger in 1926
C.
Werner Heisenberg in 1927
D.
Louis de Broglie in 1924
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ANSWER :
B. Erwin Schrödinger in 1926
3.
The Schrödinger equation for a system whose energy does not change with time is written as:
A.
E = mc²
B.
E = hν
C.
Ĥψ = Eψ
D.
λ = h/mv
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ANSWER :
C. Ĥψ = Eψ
4.
The wave function ψ in quantum mechanics:
A.
Has direct physical meaning
B.
Represents the velocity of the electron
C.
Is a mathematical function with no direct physical meaning
D.
Represents the actual path of the electron
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ANSWER :
C. Is a mathematical function with no direct physical meaning
5.
The probability of finding an electron at a point within an atom is proportional to:
A.
ψ at that point
B.
1/ψ at that point
C.
|ψ|² at that point
D.
ψ³ at that point
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ANSWER :
C. |ψ|² at that point
6.
Which of the following is NOT a feature of the quantum mechanical model of atom?
A.
Both exact position and exact velocity of electron can be determined simultaneously
B.
An atomic orbital is the wave function ψ for an electron in an atom
C.
Energy of electrons in atoms is quantized
D.
The probability of finding an electron is given by |ψ|²
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ANSWER :
A. Both exact position and exact velocity of electron can be determined simultaneously