OCR 21st Century B5,C5,P5 Exam (28/06/11)

I think I did this question right:
I said that only the sand was covalent bonding, a giant lattice structure and had high melting points.
I said the other one was a molecular structure and low melting point and had weak bonds between the molecules
I said that neither were ionic bonding

Didn't use the both column at all

THey don't both have covalent bonds as the gas is defo not a covalent bond

Sulfur Dioxide and Silicon Dioxide are both covalent bonds.