Question

The maximum oxidation state of chromium in its compounds is $+6$. Chromium has only six electrons in $ns$ and $(n - 1)d$ orbitals.

• 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

Answer 1

Answer: (A)

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

Answer 2

Since Chromium Cr has an electronic configuration of $[ Ar ] 3 d ^{5} 4 s ^{1}$, its maximum oxidation state can be $+6$,reason being it has only six electrons in $( n -1) d$ and $ns$ orbitals.