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Assertion: Energy of the orbitals increa...

Assertion: Energy of the orbitals increases as` 1s lt 2s = 2p lt 3s = 3p lt 3d lt 4s =4p =4d =4f lt `…… in a hydrogen atom.
Reason:Energy of the electron depends completely on principal quantum number.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion

B

If both assertion and reason are true but reason is not the correct explanation of the assertion

C

If assertion is true but reason is false

D

If the assertion and reason both are false

Text Solution

Verified by Experts

The correct Answer is:
C
Assertion is true but reason is false. The order 1s lt 2s =2p lt 3s = 3p = 3d lt …. Is true for the energy of an electron in a hydrogen atom and is solely determined by Principal quantum number. For multielectron system energy also depends on azimuthal quantum number. The stability of an electron in a multi-electron atom is the net result of the attraction between the electron and the nucleus and the repulsion between the electron and the rest of the electron present . Energies of different subshell (azimuthal quantum number) present within the same principal shell are found to be in order of s lt p lt d lt f
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The order of energy of orbitals is s lt p lt d lt f

Which of the following is(are) correct for if atom ? 1s lt 2s lt 2p lt 3s lt 3p 1s lt 2s = 2p lt 3s = 3p 1s lt 2p lt 3d lt 4s 1s lt 2s lt 4s lt 3d The correct choice is

Knowledge Check

  • A: Electronic energy for hydrogen atom of different orbitals follow the sequence 1s lt 2s = 2p lt 3s = 3p = 3d R : Electronic energy for hydrogen atom depends only on n and is independent of 'l' & 'm' values .

    A
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    B
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    C
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    D
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  • STATEMENT-1: For hydrogen orbital energy increases as 1s lt 2s lt 2p lt 3s lt 3p lt 3d lt 4s lt 4p... STATEMENT-2: The orbital with lower (n+l) value has lesser energy and hence filled up first.

    A
    If both the statement are TRUE and STATEMENT-2 is the correct explanation of STATEMENT-5
    B
    If both the statements are TRUE but STATEMENT-2 is NOT the correct explanation of STATEMENT-4
    C
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    D
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  • Arrange the following in order of increasing energy for hydrogen atom 1s 2s 2p 3s 3p 3d 4s 4p

    A
    `1s lt 2s lt 2p lt 3s lt 3p lt 4s lt 3d lt 4p`
    B
    `1s=2s lt 2p lt 3s =3plt 4slt 3d lt 4p`
    C
    `1s lt 2s = 2plt 3s = 3p =3d lt 4s=4p`
    D
    `1s lt 2s lt 2p gt 3s gt 3p gt4s lt 3d lt 4p`

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