Multiple choice

ASSERTION (A): Zn does not exist in variable oxidation states. REASON (R): All orbitals in Zn are completely filled with paired electrons.

In the following question there are two statements, Assertion (A) and Reason (R), consider both the statements independently and mark your answers as under:

1. If A and R both are correct and R is correct explanation of A.
2. If A and R both are correct and R is not correct explanation of A.
3. If A is correct and R is incorrect.
4. If A is incorrect and R is correct.
5. If A and R both are incorrect.

  1. 1

  2. 2

  3. 3

  4. 4

  5. 5
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Assertion as well as reason statements are correct and R is the correct explanation of A. Zn does not exist in variable oxidation states. The oxidation state of an element depends on its electronic configuration. Zn: [Ar] 3d10, 4s2 When Zn loses two electrons from 4s-orbital, it gets a very stable electronic configuration where all the electrons are paired in the d-orbital, giving +2 oxidation state. Zn2+: [Ar] 3d10 Since all orbitals are completely filled with paired electrons, it has a very stable electronic configuration.Therefore, Zn shows only one oxidation state of +2.

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