1) The forces stabilizing the alkali metal cyclic polyether complexes are
a) Covalent
b) Coordinate
c) van der Waal’s forces
d) Electrostatic

2) The coordination geometry of Fe2+ in oxyhaemoglobin is
a) Square planar
b) Square pyramidal
c) Trigonal pyramidal
d) Low spin octahedral

3) Crown ethers and cryptands are
a) Organometallic compounds
b) Normal salts
c) Complexes of inner transition elements
d) Polydentate ligands which form highly stable complexes with alkali metals


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