Question

1. Which of the following is polar?
a. CO2 b. H2
C. H20
d. BF3
2. Which of the following have highest covalent character?
a. MgCl2 b. NaCl
C. Cuci
d. KCI
3. Which have least bond order among followings?
a. 02
b. 02+
C. 02-
d. 022+

Answer 1

Answer:

Diamond is hard due to strong covalent bonds present in it. In a Graphite, carbon atoms are bounded together in a flat layers by an strong covalent bonds in a regular haxagon. These layers are held together by much wealer van der Wall's forces, therefore the crystals of graphite soft and slippery.

Answer 2

1. c. H20

2. a. MgCI2

3. a. 02

I hope it help you...