Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2. Lead pipes are readily corroded by_________________?
Correct answer: B. Acetic acid
- A. Dilute HCI
- B. Acetic acid
- C. Concentrated H2SO4
- D. None of these
Explanation
Acetic acid attacks lead and can form soluble or weakly protective lead compounds, allowing corrosion to continue. This is why acidic liquids such as vinegar must not be carried in bare lead pipes.
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