Types of Substance Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. Why do simple molecular substances have low melting and boiling points?
- A. Their covalent bonds are weak
- B. Only weak intermolecular forces exist between molecules
- C. They contain free ions
- D. They have delocalised electrons
2. When does an ionic compound conduct electricity?
- A. Only as a solid
- B. Only when molten or dissolved in water
- C. Never
- D. Only at very low temperatures
3. Why is diamond used in cutting tools?
- A. It conducts electricity well
- B. It has weak layers that slide
- C. Its rigid lattice of four strong covalent bonds per atom makes it extremely hard
- D. It is a good lubricant
4. Why does graphite conduct electricity while diamond does not?
- A. Graphite has ions that move; diamond doesn't
- B. Graphite has a delocalised electron per carbon atom; diamond's electrons are all in fixed bonds
- C. Diamond is a metal and graphite isn't
- D. Graphite melts at a lower temperature
5. Why are metals malleable?
- A. They have no ions
- B. Layers of positive ions can slide over each other while delocalised electrons hold them together
- C. They have weak covalent bonds
- D. Their ions are fixed rigidly in place