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JCE (Botswana) Acids and Bases — practice questions

Explore 5 free Acids and Bases questions in JCE (Botswana) Science. Open each question or exercise to read its content, reference answers and available explanation.

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Acids and Bases questions and exercises with answers

Showing questions 1–5 of 5.

What taste do acids have?Read the answer and worked solution →Why must strong laboratory acids be handled with gloves and safety glasses?Read the answer and worked solution →An acid and a base are mixed in the right amounts. What is the result?Read the answer and worked solution →Which everyday substance is a neutral substance?Read the answer and worked solution →What happens to litmus when it is put into an acid?Read the answer and worked solution →

Worked practice questions

What taste do acids have?

  1. A sour taste
  2. A sweet taste
  3. A salty taste
  4. A bitter taste
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Correct answer: A. A sour taste

1. Lemon juice contains citric acid and tastes sharply sour. 2. All acids share this sour taste. 3. Bases taste bitter instead, so the two are easy to tell apart in food. 4. Tasting an unknown chemical is never safe, so this is only a description. _Source: Siyavula Natural Sciences Grade 7 (CC BY 4.0), Acids_

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Why must strong laboratory acids be handled with gloves and safety glasses?

  1. They are flammable
  2. They are magnetic
  3. They are corrosive
  4. They are radioactive
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Correct answer: C. They are corrosive

1. Strong laboratory acids attack the materials they touch. 2. They can cause serious burns on skin and damage to eyes. 3. A substance that attacks materials in this way is described as corrosive. 4. That is why protective clothing, gloves and safety glasses are worn. _Source: Siyavula Natural Sciences Grade 7 (CC BY 4.0), Laboratory acids_

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An acid and a base are mixed in the right amounts. What is the result?

  1. A much stronger acid
  2. A neutral substance
  3. A much stronger base
  4. A much purer element
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Correct answer: B. A neutral substance

1. Acids and bases have chemical properties that are opposite to each other. 2. Mixing them lets each one act against the properties of the other. 3. When the amounts are right, both lose their own characteristics. 4. What is left is neither acidic nor basic, so it is a neutral substance. 5. This cancelling out is called neutralisation. 6. The mixture cannot become a stronger acid, because the base works against it. 7. It cannot become a purer element either, because two substances have reacted. _Source: Siyavula Natural Sciences Grade 7 (CC BY 4.0), Bases_

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