Question

Statement I : Ground state electronic configuration of chromium atom is $\left(Ar\right)4s^{1}3d^5$.
Statement II: Exchange energy is more wtih $\left(Ar\right)4s^{1}3d^5$ then $\left(Ar\right)4s^{2}3d^4$.

• A. Statement I is true, Statement II is also true; Statement is the correct explanation of Statement I
• B. Statement I is true, Statement II is also true; Statement II is not the correct explanation of Statement I
• C. Statement I is true, Statement II is false
• D. Statement I is false, Statement II is true

Answer 1

Answer: (A)

Statement I is true, Statement II is also true; Statement is the correct explanation of Statement I

Exchange energy depends on symmetry.
Symmetry of $\left(Ar\right)4s^{1}3d^5$ is greater than $\left(Ar\right)4s^{2}3d^4$.