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A. Check your concepts

A. Check your concepts. Study the following statements. Put a ‘ T ’ in the box against a correct statement and a ‘F’ against an incorrect statement. 1. All metals can react with dilute acids to form hydrogen. 3. Magnesium reacts with dilute hydrochloric acid to form hydrogen.

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A. Check your concepts

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  1. A. Check your concepts Study the following statements. Put a ‘T’ in the box against a correct statement and a ‘F’ against an incorrect statement. 1. All metals can react with dilute acids to form hydrogen. 3. Magnesium reacts with dilute hydrochloric acid to form hydrogen. 2. Hydrogen can relight a glowing splint. 10.3Acids and Corrosion F F T

  2. 4. Heat is given out when metals react with acids. 5. Dilute acids react with all building materials to form carbon dioxide. 6. Carbon dioxide can turn lime water milky. T F T

  3. B.Multiple Choice Questions 1. Which of the following materials is/are suitable to make containers for dilute sulphuric acid? (1) iron (2) glass (3) aluminium A. (1) only B. (2) only C. (1) and (3) only D. (2) and (3) only Write the correct answer to each question in the box provided. B

  4. 2. Which of the following does NOT react with dilute hydrochloric acid? A. marble B. limestone C. zinc D. copper D

  5. 3. Which of the following substances can be used to test for the presence of hydrogen? A. litmus paper B. lime water C. a burning splint D. a glowing splint C

  6. dilute acid B C A 1. What acid can be used in this experiment?(1 mark) The reactions of copper, magnesium and zinc with a dilute acid are shown below: B. Questions hydrochloric acid / sulphuric acid

  7. 3.What gas is formed in this experiment?(1 mark) 4. Describe how you can test for this gas.(1 mark) 5. What are the safety precautions for this experiment? (2 marks) 2. Identify the metal in each test tube. (3 marks) A: ________________ B: _______________ C: ________________ copper magnesium zinc hydrogen It burns in air to produce a 'pop' sound. - Wear safety spectacles - Dilute acid is corrosive. Handle it with care.

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