Acids, Salts and Bases - IGCSE Combined Sciences

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1. A base is a substance that will neutralise an acid to form ____ and ____

  • Salt and Carbon Dioxide
  • Salt and Water
  • Salt and Hydroxide
  • Salt and Hydrogen
  • Salt and Carbonate
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2. In order to allow crystals of Zinc Nitrate to form, how much of the aqueous solution (water) should I evaporate at the end of the expiriment?

  • One quarter
  • None
  • Half
  • All
  • Three quarters

3. Which atom/molecule is shared by all acids and gives them their low pH value?

  • Oxygen
  • Hydrogen
  • Hydroxide

4. Neutralisation of an acid occurs when H+ ions from the acid react with the OH- ions in the base react to form H20. What is H2O more commonly known as?

  • Copper Sulphate Solution
  • Salt
  • Water
  • Sodium Hydroxide
  • Manganese Chloride

5. If I reacted Sodium Hydroxide with acid X and obtained Sodium Nitrate, what is acid X?

  • Nitrogen
  • Nitric Acid
  • Sulfuric Acid
  • Water
  • Hydrogen Peroxide
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