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6. What is made in all chemical reactions?

  • A new substance
  • A change in shape
  • An explosion
  • A change in colour

7. In the reaction Metal + acid -----> Metal salt + hydrogen what will the hydrogen produced be?

  • A gas
  • A salt
  • A solid
  • A liquid

8. Ethanoic acid + calcium hydroxide ----->

  • Hydrogen + calcium ethanoate
  • Water + calcium ethanoate
  • Water + calcium hydroxide + hydrogen
  • Water + calcium ethanoate + hydrogen

9. Magnesium + sulphuric acid ----->

  • Magnesium Sulphate + water
  • Magnesium Sulphate + hydrogen + water
  • Magnesium Sulphate + hydrogen
  • Magnesium + hydrogen + water

10. magnesium carbonate + sulphuric acid ----->

  • Water + carbon dioxide + magnesium sulphate
  • Hydrogen + water + magnesium sulphate
  • Water + carbon dioxide + magnesium carbonate
  • Hydrogen + magnesium carbonate

11. What is the symbol for hydrochloric acid?

  • HDC
  • H2C
  • HCl
  • CHL

12. Metal + acid ----->

  • Metal salt + hydrogen
  • Metal + hydrogen
  • Metal salt + water
  • Metal salt + water + hydrogen

13. Bases are the opposites of...

  • Nitric substances
  • Alkalis
  • Acids
  • Atoms

14. Acids can be dilute or...

  • Concentrate
  • Waterlogged
  • Full
  • Many

15. Hydrochloric acid + calcium hydroxide ----->

  • Water + Calcium chloride
  • Water + Calcium hydrochloride + hydrogen
  • Calcium chloride + hydrogen
  • Water + Calcium hydrochloride

16. A base which dissolves in water is called .......

  • A liquid
  • An acid
  • A solid
  • An alkali
  • A dissolvable base

17. What is the symbol for sodium hydroxide?

  • NaOH
  • NaSO4
  • NaH
  • NaHCl

18. What occurs when you mix an alkali and an acid?

  • A product
  • A filter
  • A chemical reaction
  • A physical reaction

19. Name a weak acid

  • Magnesium
  • Hydrochloric acid
  • Citric acid
  • Hydrogen

20. What do all acids contain?

  • Sulfer
  • Hydrochloride
  • Hydrogen
  • Nitrate
  • Oxygen
  • Water