Which one is the wrong statement?structure [2017]

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Solution

Q.
Which one is the wrong statement [2017]

1 The uncertainty principle is $Δ E \times Δ t \geq \frac{h}{4 π}$

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 $λ = \frac{h}{m v}$ , where $m$ = mass of the particle, $ν$ = group velocity of the particle.

Ans.
(3)

In case of hydrogen like atoms, energy depends on the principal quantum number only. Hence, 2s-orbital will have energy equal to 2p-orbital.

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Solution

Q. Which one is the wrong statement [2017]

1 The uncertainty principle is ΔE×Δt≥h4π

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=hmv, where m = mass of the particle, ν = group velocity of the particle.

Ans. (3) In case of hydrogen like atoms, energy depends on the principal quantum number only. Hence, 2s-orbital will have energy equal to 2p-orbital.

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Q.
Which one is the wrong statement [2017]

1 The uncertainty principle is $Δ E \times Δ t \geq \frac{h}{4 π}$

4 de-Broglie's wavelength is given by $λ = \frac{h}{m v}$ , where $m$ = mass of the particle, $ν$ = group velocity of the particle.

Ans.
(3)

In case of hydrogen like atoms, energy depends on the principal quantum number only. Hence, 2s-orbital will have energy equal to 2p-orbital.