Need chemistry help with molecular shapes

1 which of the following is MOST likely to be a covalent bonded, polar compound

NaCL

CCl4

NH3

CH4

2 what is the molecular shape of acetylene

tetrahedron

bent triatomic

linear

pyramidal

3 a convalent compound has a pyramindal shape what is the likely general formula of the molecule

AX4

AX2

AX3

4 which explanation accounts for why carbon monoxide is NOT a polar molecule

carbon and oxygen do not form ions

there are no hydrogen atoms in the molecule

carbon is a metal and oxygen is a nonmetal

the electronegativity differences between carbon and oxygen are not very large

5 which of the follwoing compounds will likely have a bent triatomic structure

CH4

Nl3

H2S