The oxidation number of central metal atom in [Ni(CO)4] is_________________?

Related Mcqs:

1. The specie which donates electrons to central metal atom in coordination sphere is called____________________?

   A. anion B. cation C. Ligand is positively charged D. acid...

2. Oxidation state of an atom represents____________________?

   A. Number of electrons gained B. Number of electrons lost C. Apparent charge in compound D. Its vacancies...

3. The central atom along with ligands is called____________________?

   A. complex ion B. coordination sphere C. ligand D. complex compound...

4. When the central atom of coordination compound is sp3d2 hybridization the expected geometry will be___________________?

   A. tetrahedral B. square planar C. trigonal bipyramidal D. octahedral...

5. Geometry of molecule will be pyramidal if the outer post shell of the central atom has___________________?

   A. 3 bond pair one lone pair B. 2 bond pair 2 lone pair C. 1 bond pair 3 lone pair D. 3 lone pair 1 bond pair...

6. Energy released or absorbed when electrons are added in atom is_________________?

   A. Ionization potential B. Electronegativity C. Electron affinity D. Activation energy...

7. Removal of halogen and hydrogen atom is_________________?

   A. halogenation B. dehalogenation C. dehydrohalogenation D. hydrohalogenation...

8. The oxidation state of transition elements is usually _______________________?

   A. variable B. constant C. single D. infinite...

9. In complex compounds the oxidation number is written in___________________?

   A. English B. Greek C. Roman numeral D. Hebrew...

10. In pig iron the concentration of C-atom is ___________________?

    A. 0.12 — 0.25% B. 2.5 — 4.5% C. 2.0 — 4.0% D. 0.25 — 2.5%...