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JEE Main 2026 Apr 5 Shift 2, Chemistry Q2: Quantum Numbers

JEE Main2026Apr 5, Shift 2Chemistry
Q.

Which of the following statement(s) is/are true?

(A) If two orbitals have the same value of , the orbital with lower value of will have lower energy.

(B) Energies of the orbitals in the same subshell increase with increase in atomic number.

(C) The size of orbital is less than the size of orbital.

(D) Among 5f, 6s, 4d, 5p and 5d orbitals, none of the orbitals have 2 radial nodes.

Choose the correct answer from the options given below:

  1. A

    A, B and C only

  2. B

    A and C only

  3. C

    C and D only

  4. D

    A only

Solution

(A) Correct — this is the second part of the rule for orbital energies.

(B) Incorrect — orbital energies in the same subshell decrease (become more negative) as atomic number increases, due to greater nuclear attraction.

(C) Correct — orbital size grows with principal quantum number, so .

(D) Incorrect — radial nodes . For 5d: 2 radial nodes. So 5d does have 2 radial nodes, making (D) false.

Correct statements: A and C only.

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