Question

Assertion :$Ni(CO{)}_4$ complex has no unpaired electrons. Reason: 4s-electrons of Ni atom enter into the inner d-orbitals to facilitate the $ds{p}^2$-hybridization in Ni atom.

Read the above assertion and reason and choose the correct option regarding it.

• A. Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.
• B. Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1
• C. Statement-1 is true, statement-2 is false.
• D. Statement-1 is false, statement-2 is true.

Answer 1

The correct option is C Statement-1 is true, statement-2 is false.

$Ni(CO{)}_4$ is tetrahedral complex and has no unpaired electron.
CO is a strong field ligand and it will pair up unpaired electrons and undergoes $s{p}^3$-hybridization.
So Statement-1 is true, statement-2 is false.
Hence option C is correct