Which of the following system is most stable for a chelate: two fused cyclic system three fused cyclic system four fused cyclic system five fused cyclic system
Among co-ordination compounds the co-ordination number of a metal is : similar to primary valency similar to secondary valency sum or primary and secondary valencies None of the above
A group of atoms generally behave as a ligand if: they are neutral molecules or anions they are cations they are free radicals None of the above
The strongest ligand among the following is CN- Br OH- F-
Ligands in coordinate compounds: Recieve electron pairs Donete electron pairs neither receive nor donete electrons Do all reactions
Which among the following is true for the ligand metal complex: highly charged ligand forms mote stable bond the larger is the stable dipole moment, the more stable is the bond the higher is the ionisation potential of central metal ion the more stable is the bond larger is the size of ligand more stable is the bond
According to Warners theory for coordinate compounds: Primary valency is ionic only Primary valency is unionic secondary valency is ionic primary and secondary both valencies are unionic
On adding tetra ethyl lead to petrol: its octane number increases its octane number decreases its octane no does not change less pollution
Potassium ferrocyanide is a : Mixed salt Double salt Complex salt Common salt
Which among the following is colored : [Cu(NH3)4]+ [Zn(H2O)6]2+ [Cu(NH3)4]2+ [Ca(H2O)6]2+