Group trends Quiz
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5 questions, one answer each
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1. Which alkali metal is the most reactive of lithium, sodium and potassium?
- A. Lithium
- B. Sodium
- C. Potassium
- D. They are equal
2. What is produced when sodium reacts with water?
- A. Sodium oxide and oxygen
- B. Sodium hydroxide and hydrogen
- C. Sodium chloride and hydrogen
- D. Sodium carbonate and carbon dioxide
3. Which halogen is a red-brown liquid at room temperature?
- A. Chlorine
- B. Iodine
- C. Fluorine
- D. Bromine
4. Chlorine is added to potassium iodide solution. What happens?
- A. Nothing, since iodine is more reactive
- B. Chlorine displaces iodine
- C. Potassium is displaced
- D. The solution becomes colourless
5. Why is argon used in filament lamps?
- A. It is unreactive and stops the hot filament reacting
- B. It glows brightly
- C. It is very dense
- D. It is a good conductor