Assertion: The outer electronic configurations of Cr and Cu are 3d5 4s1 and 3d10 4s1 respectively. Reason: Electrons are filled in orbitals in order of their increasing energies given by (n + l) rule.

Question

Assertion: The outer electronic configurations of Cr and Cu are 3d5 4s1 and 3d10 4s1 respectively. Reason: Electrons are filled in orbitals in order of their increasing energies given by (n + l) rule. (A) If both assertion and reason are true and reason is the correct explanation of assertion. (B) If both assertion and reason are true but reason is not the correct explanation of assertion. (C) If assertion is true but reason is false. (D) If both assertion and reason are false.

Tardigrade Admin · Accepted Answer

Correct answer is (b) If both assertion and reason are true but reason is not the correct explanation of assertion.

Q. Assertion: The outer electronic configurations of Cr and Cu are 3d54s1 and 3d104s1 respectively. Reason : Electrons are filled in orbitals in order of their increasing energies given by (n+l) rule.

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

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

If assertion is true but reason is false.

If both assertion and reason are false.

Correct answer is (b) If both assertion and reason are true but reason is not the correct explanation of assertion.

Q. Assertion: The outer electronic configurations of $C r$ and $C u$ are $3 d^{5} 4 s^{1}$ and $3 d^{10} 4 s^{1}$ respectively.
Reason : Electrons are filled in orbitals in order of their increasing energies given by $(n + l)$ rule.