Non - directional orbital is : from Chemistry Structure of Atom

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 Multiple Choice QuestionsMultiple Choice Questions

441.

Which of the following series of transitions in the spectrum of hydrogen atom fall in visible region?

  • Balmer series

  • Paschen series

  • Brackett series

  • Lyman series


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442.

Non - directional orbital is :

  • 4p

  • 4d

  • 4f

  • 3s


D.

3s

Non - directional orbital is : 3s because s - sub - shell has only one orbital and it is spherical .Hence , s - orbitals are non - directional .


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443.

Assertion (A) : Atoms with completely filled and half-filled sub-shells are stable.

Reason (R): Completely filled and half-filled sub-shells have symmetrical distribution of electrons and have maximum exchange energy.

The correct answer is

  • (A) and (R) are correct, (R) is the correct explanation of (A)

  • (A) and (R) are correct, (R) is not the correct explanation of (A)

  • (A) is correct, but (R)is not correct

  • (A) is not correct, but (R) is correct


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