Properties of Covalent Substances (AQA A-Level Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What type of forces hold simple molecular substances together?
What type of forces hold simple molecular substances together?
Weak van der Waals forces
Why do simple molecular substances have low melting and boiling points?
Why do simple molecular substances have low melting and boiling points?
Weak intermolecular forces easy to overcome
Why does water have a relatively high boiling point for a simple molecular substance?
Why does water have a relatively high boiling point for a simple molecular substance?
Presence of hydrogen bonding
Why are simple molecular substances poor conductors of electricity?
Why are simple molecular substances poor conductors of electricity?
No free-moving charged particles
What happens to iodine when it is heated?
What happens to iodine when it is heated?
It sublimes easily
How many covalent bonds does each carbon atom form in diamond?
How many covalent bonds does each carbon atom form in diamond?
Four strong covalent bonds
Why does diamond not conduct electricity?
Why does diamond not conduct electricity?
It has no free electrons
How many covalent bonds does each carbon atom form in graphite?
How many covalent bonds does each carbon atom form in graphite?
Three covalent bonds
Why can graphite conduct electricity?
Why can graphite conduct electricity?
Each carbon has one free electron
Why is graphite useful as a lubricant?
Why is graphite useful as a lubricant?
Layers can slide over each other