The Halogens

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1. What is a precipitation reaction?

  • The formation of a solid from a solution during a chemical reaction.
  • When a more reactive halogen displaces a less reactive halogen in a compound.
  • When electrons are removed from an atom.
  • When a carbonate is heated to produce a metal oxide and carbon dioxide gas.
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2. What is formed when a Group 7 element reacts with a metal?

  • Ionic halide with an X- ion.
  • Ionic halide with an X+ ion.
  • Covalent halide with an X- ion.
  • Metallic halide with an X+ ion.

3. Which of these statements is false?

  • Iodide reacts with Silver Nitrate to form a yellow precipitate which is insoluble in concentrate ammonia - NH3 (aq).
  • Iodide reacts with Silver Nitrate to form a yellow precipitate that is soluble in concentrate ammonia - NH3.
  • Bromide reacts with Silver Nitrate to form a cream precipitate which is soluble in concentrate ammonia - NH3 (aq).
  • Chloride reacts with Silver Nitrate to form a white precipitate which is soluble in dilute ammonia - NH3 (aq).

4. What colour and state is fluorine?

  • Pale yellow-green gas.
  • Brown liquid.
  • Pale yellow-green solid.
  • Red gas.

5. What is the typical charge of an ionic halide?

  • 1-
  • 2+
  • 1+
  • 2-

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