HARD
AS and A Level
IMPORTANT
Earn 100

Explain why molten sodium iodide is conducting electricity but molten iodine does not. 

Important Questions on Chemical Bonding

HARD
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 4 - Chemical Bonding>EXAM-STYLE QUESTIONS>Q 6
The boiling point of sodium iodide is 1304°C. The boiling point of iodine is 184°C. Explain this difference.
HARD
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 4 - Chemical Bonding>EXAM-STYLE QUESTIONS>Q 6

The Pauling electronegativities of Naand iodine are shown. Sodium = 0.9, iodine = 2.5

Use these electronegativities values to explain why sodium iodide is an ionic compound and not a covalent compound.

EASY
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 4 - Chemical Bonding>EXAM-STYLE QUESTIONS>Q 7
Hydrogen sulphide, H2S is a covalent compound. Draw a dot-and-cross diagram for hydrogen sulphide.
EASY
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 4 - Chemical Bonding>EXAM-STYLE QUESTIONS>Q 7
Draw a diagram of a hydrogen sulphide molecule to show its shape. Show on your diagram the value of the HSH bond angle.
EASY
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 4 - Chemical Bonding>EXAM-STYLE QUESTIONS>Q 7
Draw a diagram of a hydrogen sulphide molecule to show its shape. Show on your diagram the partial charges on each atom.
EASY
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 4 - Chemical Bonding>EXAM-STYLE QUESTIONS>Q 7
Draw a diagram of a hydrogen sulphide molecule to show its shape. Show on your diagram, an arrow showing the exact direction of the dipole in the molecule as a whole.
EASY
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 4 - Chemical Bonding>EXAM-STYLE QUESTIONS>Q 7
Oxygen, O, sulphur, S, and selenium, Se, are in the same group in the periodic table. Explain why hydrogen selenide, H2Se, has a higher boiling point than hydrogen sulphide, H2S.
EASY
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 4 - Chemical Bonding>EXAM-STYLE QUESTIONS>Q 7
Oxygen, O, sulphur, S, and selenium, Se, are in the same group in the periodic table. Explain why the boiling point of water is so much higher than the boiling point of hydrogen sulphide.