Which one of the following statements is wrong?

Question

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

MARKS App · Accepted Answer

(i) λ = h p = h mv (ii) Δx . Δp = h 4 π Δx × Δp × dt Δt ≥ h 4 π ∴ Δp Δt = f fΔx Δt ≥ h 4 π , fΔx = ΔE ΔE . Δt ≥ h 4 π (iii) 3 rd statement is true. (iv) The energy of 2 s - orbital and 2 p - orbital in case of hydrogen like atoms is equal because they are single electron species.

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