Covalent bonding Quiz
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5 questions, one answer each
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1. What is a covalent bond?
- A. The attraction between positive and negative ions
- B. A shared pair of electrons between atoms
- C. A transfer of electrons from a metal to a non-metal
- D. The force between molecules
2. Which substance has a giant covalent structure?
- A. Water
- B. Carbon dioxide
- C. Sodium chloride
- D. Silica
3. Why does methane, CH₄, have a very low boiling point?
- A. It has weak covalent bonds
- B. It has delocalised electrons
- C. The forces between its molecules are weak
- D. It is held in a giant lattice
4. Why does graphite conduct electricity?
- A. It contains ions
- B. It has delocalised electrons that can move
- C. It has a high melting point
- D. It is made of small molecules
5. How many shared pairs of electrons are there in one molecule of carbon dioxide?
- A. 2
- B. 3
- C. 4
- D. 8