The Halogens

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1. What happens in a 'displacement reaction'?

  • A less-reactive halogen will reduce and displace a halide of a more-reactive halogen.
  • A more-reactive halogen will oxidise and displace a halide of a less-reactive halogen.
  • A more-reactive halogen will reduce and displace a halide of a less-reactive halogen.
  • A less-reactive halogen will oxidise and displace a halide of a more-reactive halogen.
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2. What is the typical charge of an ionic halide?

  • 2+
  • 1+
  • 1-
  • 2-

3. What is meant by the 'oxidising power' of a Halogen?

  • The ease of a Halogen atom to lose its outer electrons.
  • A measure of the strength with which a halogen atom is able to attract and capture an electron to form a halide.
  • A measure of the strength between the outer electron and the nucleus.
  • The ease of a Halogen to attract another Halogen.

4. What is a precipitation reaction?

  • When a carbonate is heated to produce a metal oxide and carbon dioxide gas.
  • The formation of a solid from a solution during a chemical reaction.
  • When electrons are removed from an atom.
  • When a more reactive halogen displaces a less reactive halogen in a compound.

5. What is 'Disproportionation'?

  • A reaction in which an element is reduced.
  • A reaction in which an element is neither reduced or oxidised.
  • A reaction in which the same element is both reduced and oxidised.
  • A reaction in which an element is oxidised.

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