Question

Pick the true statement amongst the following.

• A. $Ni\left(II\right)$ compounds are less stable than $Pt\left(II\right)$ compounds
• B. $Ni\left(IV\right)$ compounds are more stable that $Pt\left(IV\right)$ compounds
• C. $Ni\left(IV\right)$ compounds are less stable than $Pt\left(IV\right)$ compounds
• D. $Ni\left(IV\right)$ compounds are more stable than $Pt\left(II\right)$ compounds

Answer 1

The correct option is C $Ni\left(IV\right)$ compounds are less stable than $Pt\left(IV\right)$ compounds

Platinum (IV) compounds are relatively more stable than nickel (IV) compounds. Because the sum of the first four ionization enthalpies for nickel is greater than that of platinum. The ionization of Ni to Ni(IV) requires more energy than the energy required by Pt to form Pt(IV).

Hence option C is correct.