Q. The geometry of $ Ni{{(CO)}_{4}} $ and $ Ni(PP{{h}_{3}})C{{l}_{2}} $ are:
BHUBHU 2005
Solution:
$ Ni{{(CO)}_{4}}- $ Oxidation state of $ Ni=0 $ .
Oxidation state of $ Ni $ in $ Ni{{(PP{{h}_{3}})}_{2}}C{{l}_{2}} $
is $ x+0\times 2+(-2)=0 $ $ \therefore $ $ x=+2 $

