Exams › NEET › Chemistry

Which one is the wrong statement? (a) The uncertainty principle is ΔE × Δt ≥ h / 4π (b) Half filled and fully filled orbitals have greater stability due to greater exchange energy, greater symmetry and more balanced arrangement. (c) The energy of 2s orbital is less than the energy of 2p orbital in case of Hydrogen like atoms. (d) de-Broglie's wavelength is given by λ = h / mv, where m = mass of the particle, v = group velocity of the particle.

1. ΔE × Δt ≥ h / 4π
2. Half filled and fully filled orbitals have greater stability due to greater exchange energy, greater symmetry and more balanced arrangement.
3. The energy of 2s orbital is less than the energy of 2p orbital in case of Hydrogen like atoms.
4. de-Broglie's wavelength is given by λ = h / mv, where m = mass of the particle, v = group velocity of the particle.

Correct answer: The energy of 2s orbital is less than the energy of 2p orbital in case of Hydrogen like atoms.

Solution

In hydrogen-like atoms, the energy of orbitals depends only on the principal quantum number (n), so 2s and 2p orbitals have the same energy. The statement in option (c) is incorrect.

Related NEET Chemistry questions

• Protons and neutrons are also called
• From the \( \alpha \) -particle scattering experiment, Rutherford concluded that: This question has multiple correct options
• Which of following was not explained by Rutherford?
• The energy of an electron in the ground state of \( \boldsymbol{H} \) atom is \( -\mathbf{1 3 . 6 e V} \) The negative sign indicates that:
• Outer electronic configuration of Cl⁻ is:
• The sub-shell with lowest value of (n + l) is filled up first. When two or more sub-shells have the same (n + l) value, the sub-shell with lowest value of 'n' is filled up first. Therefore, the correct order is:

⚔️ Practice NEET Chemistry free + battle 1v1 →