[Karenyap1907]

1) ice is less dense than water because
A)molecules of ice are held to each other by covalent bonding
B)the molecular structure of ice is less orderly than that of water
C)ice has a molecular structure in which water molecule are arranged randomly
D)none of these

2)chlorine is a gas, bromine is liquid and iodine is solid because
A)they have different intermolecular force
B)their bond have different polarity
C)the strengths of the dipole dipole interactions differ in each compound
D)none of these

[Borek]

And?

If you expect us to answer these questions for you, you should read the forum rules that you agreed to when registering. You have to show your attempts to receive help.

[Babcock_Hall]

You can eliminate some answers with a modicum of chemical knowledge.