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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?
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?
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