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Q.

The variation of radial probability density R2(r) as a function of distance r of the electron from the nucleus for 3p-orbital :

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a

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b

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c

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d

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answer is D.

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Detailed Solution

  • The number of radial nodes for an orbital = n-l-1.
  • Where, n = principal quantum number and l= azimuthal quantum number.
  • Since n = 3 and l = 1 for the given atomic orbital (3p orbital), the number of radial nodes = 3-1-1 = 1.
  • Hence, the radial probability distribution curve should contain a trough representing a radial node.
  • There are two graphs showing this behavior. 
  • The correct one is fourth option since, the position of principal maximum (largest peak) occurs at a greater distance. 
  • It means, the crest with greater height should be farther away from the nucleus, when compared to the smaller crest.
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