11 mark
Which substance has a giant lattice of atoms?
diamond
ice
poly(ethene)
sodium chloride
Did this page help you?
Covalent Bonding & Structure (Edexcel International AS Chemistry)
Exam Questions
45 mins10 questions
21 mark
Which molecule is planar?
CF4
C2F4
PF5
SF6
Did this page help you?
11 mark
The hydrogen ion, H+, bonds to a water molecule forming an H3O+ ion.
For H3O+, what shape and H-O-H bond angle are predicted by the electron-pair repulsion theory?
trigonal planar 120°
trigonal planar 117.5°
trigonal pyramidal 107°
trigonal pyramidal 104.5°
Did this page help you?
21 mark
Which of these molecules is not polar?
CO2
HCl
H2O
NH3
Did this page help you?
31 mark
Which row gives the correct polarities of the S—F bond and the SF6 molecule?
(1)
| Polarity of S—F bond | Polarity of SF6 molecule | |||
| ☐ | A | polar | polar | |
| ☐ | B | polar | non-polar | |
| ☐ | C | non-polar | polar | |
| ☐ | D | non-polar | non-polar |
Did this page help you?
41 mark
Which compound has bonds that are the most polar?
H2O
H2S
NH3
PH3
Did this page help you?
51 mark
Which of these molecules is the most polar?
HF
OF2
BF3
CF4
Did this page help you?