C2

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1. What does gas chromatography do to the mixture of solvents?

  • It separates them
  • It identifies what compound the solvent is made from
  • It shows what gas is produced
  • It helps chromate the solvents making the easier to use
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2. Why do hydrogen ions move to the negative electrode?

  • Because hydrogen is a BOSS
  • Because they have negative ions that are attracted to the negative electrode
  • Because they have positive ions and opposites attract
  • Because they react with the sodium metal to produce a positive ions which is attracted to the negative electrode

3. How does an hydrogen atom turn into an hydrogen ion?

  • It reacts with a metal
  • It reacts with nitrogen
  • Gains an electron
  • Loses an electron

4. Why does the catalyst work for a long time before it needs replacing?

  • It takes long to get used up
  • It is not used up
  • It reacts with elements that are able to clean the catalyst
  • A catalyst never needs replacing

5. What are nanoparticles?

  • Particles sized 1-100nm across
  • Particles sized from 1-1000nm across
  • Small particles
  • Particles with a high volume to surface area ration

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