Q.1
What is an acid?
  • A substance that will neutralise an acid
  • A substance that produces H+ ions when added to water
  • A soluble base
  • A chemical which changes colour when added to acids and alkalis
Q.2
What is an alkali?
  • A substance that will neutralise an acid
  • A substance that produces H+ ions when added to water
  • A soluble base
  • A chemical which changes colour when added to acids and alkalis
Q.3
A substance with a pH of 6 is...
  • a weak acid
  • a strong acid
  • a weak alkali
  • neutral
Q.4
Pick the correct equation for the reaction between hydrochloric acid and iron oxide.
  • Hydrochloric acid + solid iron (III) oxide → iron (III) chloride solution + water
  • Hydrochloric acid + iron (III) oxide → iron (II) chloride solution + water
  • Hydrochloric acid + iron (III) oxide → iron (III) chlorate solution + water
  • Sulfuric acid + iron (III) oxide → iron (III) chloride solution + water
Q.5
We can react an acid and an alkali together to produce a salt. The correct name for this type of chemical reaction is...
  • combustion
  • oxidation
  • thermal decomposition
  • neutralisation
Q.6
When an acid and an alkali react, a salt and water are formed. Pick the correct salt produced when ammonium hydroxide reacts with nitric acid.
  • Ammonium chloride
  • Ammonium nitrate
  • Ammonium sulfate
  • Ammonium phosphate
Q.7
Salts can also be made by reacting metals with acids. What gas is given off when a metal reacts with an acid?
  • Oxygen
  • Carbon dioxide
  • Hydrogen
  • Nitrogen
Q.8
Precipitation reactions occur when an insoluble salt is formed. Precipitation reactions can be used in industry to...
  • remove some substances from waste water
  • split large molecules into smaller ones
  • remove unwanted impurities from metals
  • remove metals from their ores
Q.9
A strong acid...
  • turns universal indicator paper green
  • has a high pH number
  • is partially ionised in water
  • is 100% ionised in water
Q.10
Pick the correct combination of definitions.
  • Acid - proton acceptor Alkali - proton donor
  • Acid - proton donor Alkali - proton acceptor
  • Acid - proton giver Alkali - proton donor
  • Acid - proton acceptor Alkali - proton acceptor
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