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Statement 1. 4s orbital has lower energy...

Statement 1. 4s orbital has lower energy than 3d orbital.
Statement 2. s-orbital is spherically symmetrical and remains closer to the nucleus and has lower energy than d-orbital.

A

Statement-1 is true , Statement-2 is also true.
Statement-2 is the correct explanation of Statement-1

B

Statement-1 is true , Statement-2 is also true.
Statement-2 is not correct explanation of Statement-1

C

Statement -1 is true, Statement-2 is false.

D

Statement-1 is false, Statement-2 is true.

Text Solution

Verified by Experts

The correct Answer is:
B
Correct explanation. Because of shielding effect, 3d orbital has higher energy than 4s orbital. For details, consult text part.
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Knowledge Check

  • d_z^2 orbital has :

    A
    Two lobes along z-axis and a ring along `xy-"plane"`
    B
    Two lobes along z-axis and two lobes along xy-plane
    C
    Two lobes along z-axis and a ring along yz-plane
    D
    Two lobes and a ring along z-axis.

  • Assertion : 2s orbital is spherically symmetrical . Reason: s-orbital is sperically dependence.

    A
    Assertion and reason both are correct statements and reason is correct explanation for assertion.
    B
    Assertion and reason both are correct statements but reason is not correct explanation for assertion.
    C
    Assertion is correct statement but reason is wrong statement.
    D
    Assertion is wrong statement but reason is correct statement.

  • Statement 1. In potassium atom, 19th electron enters 4s orbital and not 3d orbital. Statement 2. Orbital energies are compared by (n+l) rule.

    A
    Statement-1 is true , Statement-2 is also true.
    Statement-2 is the correct explanation of Statement-1
    B
    Statement-1 is true , Statement-2 is also true.
    Statement-2 is not correct explanation of Statement-1
    C
    Statement -1 is true, Statement-2 is false.
    D
    Statement-1 is false, Statement-2 is true.

    • Similar Questions

    Explore conceptually related problems

    For a mutielectron atom, the maximum of 2p-orbital in radial probability distribution graph is nearer the nucleus than that of 2s-orbital . Therefore, 2p-orbital should be closer to the nucleus and lower in energy than 2s-orbital. But 2s-orbital has lower energy than 2p-orbital. Explain.

    In multi-electron atom 4s-orbital is lower in energy than

    Statement 1: The first ionization energy of B is less than Be. Statement 2: 2p orbital lower in energy than 2s.

    In a hydrogen atom, which orbital is higher in energy than 3s-orbital ?

    Statement I: The 3p orbitals are higher in energy as compared to 3s orbital. Statement II: (n + I) for 3p orbitals is lower than that of 3d orbitals.

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