Acids and Alkalis

 

1. Which of the following is an acid?

    vinegar

    soap

    water

    petrol

2. Which of the following is an alkali?

    vinegar

    water

    sodium chloride solution

    sodium hydroxide

3. What pH is a neutral solution?

    1

    14

    6

    7

4. What name is given when acid is mixed with alkali so that the acid is cancelled out?

    oxidation

    neutralisation

    reduction

    decomposition

5. What colour does universal indicator turn when it is put in to a neutral solution?

    green

    red

    purple

    brown

6. What colour does litmus indicator turn when it is placed in an acidic solution?

    green

    red

    purple

    brown

7. Which of the following equations shows neutralisation?

    acid + alkali = water

    metal + acid = salt + hydrogen

    acid + alkali = salt + water

    metal + oxygen = metal oxide

8. What type of salt is produced from nitric acid?

    A nitrate

    A sulphate

    A chloride

    A nitride

9. Which of the following acids and alkalis could have been mixed to make sodium sulphate?

    Sodium hydroxide + nitric acid

    Sodium hydroxide + sulphuric acid

    Calcium hydroxide + sulphuric acid

    Calcium hydroxide + nitric acid

10. Black solid copper oxide is placed in to warm colourless sulphuric acid. What change would you see happen?

    The colourless solution turns blue as the copper oxide slowly disappears

    The mixture effervesces

    The mixture catches fire

    The copper oxide dissolves to give a dark purple solution