AQA Chemistry C3 Quiz

This quiz will cover all of C3.  I will be adding questions as I go!

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  • Created by: Josh
  • Created on: 08-05-11 09:32

1. [Water and Solubility] Why does a refridgerated fizzy drink that was in a bottle effervesce when it is poured into a glass?

  • None of the above
  • All of the above
  • Because the air outside the bottle is at a lower pressure than the inside of the bottle; this decrease in pressure means that less carbon dioxide can be dissolved in the drink, so some bubbles out.
  • Because the drink is warming up, and so less carbon dioxide can be dissolved in it; this causes some to bubble out.
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Other questions in this quiz

2. [Water and Solubility] Which two ions present in 'hard water' cause its 'hardness'?

  • Ca 2+ and Fe 2+
  • Fe 2+ and Fe 3+
  • Mg 2+ and K +
  • Ca 2+ and Mg 2+
  • Al 3+ and Ca 2+

3. [Water and Solubility] A domestic water softener usually contains ions of which element?

  • Al
  • Na
  • Cl
  • Br
  • Hg

4. [Water and Solubility] Why is thermal pollution dangerous to aquatic fauna?

  • Because the heat scares the fish.
  • Because the heat reduces the amount of oxygen that can be dissolved in the water - this means the aquatic creatures can get less oxygen.
  • Because the heat increases the amount of dissolved oxygen in the water - this causes the fish to get oxygen poisoning.

5. [Water and Solubility] The solubility of solid X at 50°C is 10g/100g water. At 20°C, the solubility is 2g/100g water. I cool a 50°C saturated solution of X down to 35°C; 4.3g crystallises out of solution. How much more will crystallise out of the

  • 3.75g
  • 3.55g
  • 3.6g
  • 3.7g
  • 3.65g

Comments

nush

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Very very good :) 5/5

Josh

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Thanks :)

rubani

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v helpful 

rubani

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v helpful 

rubani

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v helpful 

rubani

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v helpful 

Hannah

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6 wrong!

GeorgeHarnett

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v helpful

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