Salters B Elements from the Sea Quiz

Test on the unit 'Elements from the Sea'

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  • Created by: jess
  • Created on: 09-03-14 18:14

1. How can you define polar molecules?

  • Only molecules with a permanent dipole
  • All molecules which have bonds
  • All molecules with dipoles
  • Only molecules with instantaneous dipoles
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2. How are chlorine and bromine transported?

  • chlorine-as a liquid by rail or road tanker. bromine-in lead-lined steel tanks supported in strong metal frames
  • chlorine-as a gas by rail or road tanker. bromine-in lead-lined steel tanks supported in strong metal frames
  • chlorine-as a liquid by air travel(in a plane). bromine-as a liquid by rail or road tanker
  • chlorine-as a gas by air travel(in a plane). bromine-as a liquid by rail or road tanker.

3. What are the advantages of a batch process?

  • Time consuming to clean reaction vessel, may require larger workforce, many products in one reaction vessel
  • Cost effective for small quantities, low capital costs for plant, different products in the same vessel
  • Suited to high tonnage products, can operate for months at a time without shut-down, easily automated therefore smaller workforce
  • Less flexible, suited to all types of products, low cost to build plants

4. What is the fourth ionisation enthalpy?

  • X3+(g) --> X4+(g) + e-
  • X4+(g) --> X4+(g) + e-
  • X(g) --> X4+(g) + e-
  • X(g) --> 4X+(g) + e-

5. If an oxidation state decreases, the compound is...

  • neutralised
  • reduced
  • oxidised

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