chemistry: molecular 2

Pls help on those Qs.

1.Which of the following is a non-polar molecule having one or more polar bonds?
H2
HI
CBr4
PH3

2.What is the shape of the phosphate ion?
planar
triangular
tetrahedral
linear

3.Which one of the following molecules possesses a trigonal bipyramidal structure?
PF5
SF4
BrF3
PF6-

4.Which one of the following molecules does NOT have a dipole moment?
CO
CH3Cl
NH3
XeF4

5.What is the shape of the PH4+ ion?
trigonal planar
tetrahedral
trigonal pyramidal
octahedral

6.Which of the following has a pyramidal structure?
ClO3-
ClO4-
ClO2
ClO2-