Acids and alkalis – practice for Years 8–9

Sample questions on Acids and alkalis with the right answer and a worked solution, from easy to hard. In the Pickles Academy app a child gets new questions of the same kind every time, so they can't just learn the answers by heart.

Subject

Chemistry

Year

Years 8–9

Curriculum area

Compounds, acids and bases

Question types: Acids and alkalis YES/NO

Sample questions

1. Question 1 Easy

   Decide whether each statement is true (YES) or not (NO).

   1. Solutions of alkalis have a pH above 7.
   2. In neutralisation, an acid reacts with an alkali to make a salt and water.
   3. Vinegar contains acetic (ethanoic) acid.
   Show the solution

   Answer:

   1. Solutions of alkalis have a pH above 7. – yes
   2. In neutralisation, an acid reacts with an alkali to make a salt and water. – yes
   3. Vinegar contains acetic (ethanoic) acid. – yes

   How it works: 1. YES 2. YES 3. YES

2. Question 2 Normal

   Decide whether each statement is true (YES) or not (NO).

   1. A solution with a pH below 7 is acidic.
   2. The lower the pH, the more alkaline the solution.
   3. To dilute an acid, you pour water into the acid.
   4. Soapy water is acidic.
   Show the solution

   Answer:

   1. A solution with a pH below 7 is acidic. – yes
   2. The lower the pH, the more alkaline the solution. – no
   3. To dilute an acid, you pour water into the acid. – no
   4. Soapy water is acidic. – no

   How it works: 1. YES 2. NO – a lower pH means more acidic 3. NO – always pour the acid into the water 4. NO – soapy water is alkaline

3. Question 3 Hard

   Decide whether each statement is true (YES) or not (NO).

   1. Solutions of alkalis have a pH above 7.
   2. In neutralisation, an acid reacts with an alkali to make a salt and water.
   3. Vinegar contains acetic (ethanoic) acid.
   4. The lower the pH, the more alkaline the solution.
   5. To dilute an acid, you pour water into the acid.
   Show the solution

   Answer:

   1. Solutions of alkalis have a pH above 7. – yes
   2. In neutralisation, an acid reacts with an alkali to make a salt and water. – yes
   3. Vinegar contains acetic (ethanoic) acid. – yes
   4. The lower the pH, the more alkaline the solution. – no
   5. To dilute an acid, you pour water into the acid. – no

   How it works: 1. YES 2. YES 3. YES 4. NO – a lower pH means more acidic 5. NO – always pour the acid into the water

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