NEET Chemistry: Quantum numbers Practice Questions
11 free multiple-choice questions on Quantum numbers (Atomic Structure) for NEET Chemistry, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. The azimuthal quantum number (l) for a given principal quantum number (n) can take on which of the following values?
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Correct answer: A — 2
The azimuthal quantum number (l) must satisfy the condition l = 0, 1, 2, ..., (n-1). Therefore, if n=4, l can be 0, 1, 2, or 3.
Q2. In an atomic system, the maximum number of orbitals that can be present for a given azimuthal quantum number (l) is determined by:
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Correct answer: D — (2l+1)
The number of orbitals associated with a specific azimuthal quantum number l is given by the formula 2l + 1.
Q3. The azimuthal quantum number (l) is associated with which property of an orbital?
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Correct answer: A — Shape of the orbital (subshell)
The azimuthal quantum number (l) determines the shape of the orbital (s, p, d, f), which is related to the angular momentum.
Q4. Which quantum number determines the size of the orbital?
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Correct answer: B — n
The principal quantum number (n) determines the principal energy level and thus the size of the orbital.
Q5. Which quantum number determines the principal energy level of an electron?
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Correct answer: A — Principal quantum number
The principal quantum number (n) defines the main energy level and size of the orbital for an electron.
Q6. Which quantum number describes the intrinsic spin of an electron?
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Correct answer: B — Spin quantum number (mₛ)
The spin quantum number (mₛ) determines the intrinsic spin (spin up or spin down) of the electron.
Q7. How many distinct orbitals are possible for a given azimuthal quantum number (l)?
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Correct answer: B — 2l+1
The number of orbitals associated with a given l is 2l + 1.
Q8. The total number of orbitals in a subshell defined by the azimuthal quantum number l=3 is:
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Correct answer: D — 7
The number of orbitals in a subshell is given by 2l+1. For l=3, the number of orbitals is 2(3)+1 = 7.
Q9. Which of the following quantum numbers determines the size and principal energy level of an electron in an atom?
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Correct answer: A — Principal quantum number (n)
The principal quantum number (n) defines the main energy level and the size of the orbital, directly related to the electron's energy.
Q10. Which quantum number determines the shape of an electron's orbital?
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Correct answer: B — l
The azimuthal quantum number, 'l' (angular momentum quantum number), defines the shape of the orbital (subshell, e.g., s, p, d, f).
Q11. What is the maximum value for the magnetic quantum number (m_l) for a given azimuthal quantum number (l)?
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Correct answer: B — -l
The magnetic quantum number (m_l) can take integer values from -l to +l, including 0. The maximum value is l.
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