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For an electron in a hydrogen atom, ( $Δ$ v, $Δ$ x are uncertainties in velocity and position respectively, h = Planck’s constant, m = mass of electron, n = principal quantum number)

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$Δ V . Δ x \geq \frac{h}{4 π m}$ is valid

Magnitude of orbital angular momentum is $\frac{n h}{2 π}$

de-Broglie wave length is maximum in $1^{s t}$ orbit

Spin quantum number is not defined

answer is A, B, C.

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Detailed Solution

$Δ V . Δ x \geq \frac{h}{4 π m}$ is valid

Magnitude of orbital angular momentum is $\frac{n h}{2 π}$

de-Broglie wave length is maximum in $1^{s t}$ orbit

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