Arrange s, p and d sub-shells of a shell in the increasing order of effective nuclear charge (Zeff) experienced by the electron present in them.

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Ans: The effective nuclear charge (Zeff) is defined as the net positive charge experienced by the outermost electrons in the atom. With the increase of Azimuthal quantum number (l) the Zeff experienced by the electron decreases. He

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In 4d orbital, n = 4 and l=2

Radial nodes = nl1

Radial nodes = 4 – 2 – 1 = 1

And angular nodes,  l=2

B 2 + σ 1 s 2 s * 1 s 2 σ 2 s 2 σ * 2 s 2 π 2 p 1  

Here, number of unpaired electrons, n = 1

Spin only moment ;    μ = n ( n + 2 ) B . M

= 173 × 10-2 B.M

 

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Δ H = Δ U + Δ ( P V )

= Δ U + P Δ V + V Δ P

= Δ U + P Δ V   (At constant pressure)

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Chemistry NCERT Exemplar Solutions Class 11th Chapter Two 2025

Chemistry NCERT Exemplar Solutions Class 11th Chapter Two 2025

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