You will need a copy of the periodic table! |
1. Which properties are true for most metals?
- A. high density and high melting point
- B. high density and low melting point
- C. low density and high melting point
- D. low density and low melting point
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2. What type of structure do both diamond and graphite have?
- A. giant ionic
- B. giant covalent
- C. giant metallic
- D. simple molecular
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3. Nitrogen has a low boiling point because there are..
- A. weak covalent bonds between nitrogen atoms
- B. weak covalent bonds between nitrogen molecules
- C. weak forces between nitrogen molecules
- D. weak forces between nitrogen atoms
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4. Rows A to D show the properties of 4 substances.
Which substance is an ionic compound?
| |
Melting point |
Electrical conductivity when molten |
Solubility in water |
| A |
low |
good |
soluble |
| B |
low |
poor |
insoluble |
| C |
high |
good |
soluble |
| D |
high |
poor |
insoluble |
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5. Copper is the metal used in most electrical wiring because it is a very good conductor of electricity.
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Copper is a good conductor of electricity because it..
- A. contains ions which are free to move
- B. contains atoms which are not free to move
- C. contains delocalized electrons which are free to move
- D. contains delocalized electrons which are not free to move
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Q6-7:
Sodium and fluorine react to form the compound sodium fluoride. |
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| 6. Which statement about the melting point of sodium fluoride is true?
Sodium fluoride has a ……
- A. .. low melting point as the forces between the ions are weak
- B. .. low melting point as the forces between the molecules are weak
- C. .. high melting point as the forces between the ions are strong
- D. .. high melting point as the forces between the atoms are strong
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7. Which statement is true about the conduction of electricity by sodium fluoride?
- A. Sodium fluoride does not conduct in any state
- B. Sodium fluoride conducts when solid or molten
- C. Sodium fluoride conducts when solid or aqueous
- D. Sodium fluoride conducts when molten or aqueous.
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8. Nitrogen and hydrogen gases react to produce ammonia, NH3. Ammonia is a gas at room temperature because ..
- A. it is produced from two gases
- B. there are weak covalent bonds between the nitrogen and hydrogen atoms
- C. it consists of ions with weak attractions between them
- D. it consists of neutral molecules with weak intermolecular forces
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| 9. The melting point of calcium chloride is much higher than that of water
State the type of bonding in calcium chloride and in water. |
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Calcium chloride |
water |
| A |
ionic |
covalent |
| B |
ionic |
ionic |
| C |
covalent |
covalent |
| D |
covalent |
ionic |
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