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JAMB Chemistry 1983 Question 28

Question 28

Metals and their Compounds

Which of these metals, Mg, Fe, Pb and Cu will dissolve in dilute HCl?

  1. A.All the metals.
  2. B.Mg, Fe and Cu.
  3. C.Mg, Fe and Pb
  4. D.Mg and Fe only
  5. E.Mg only.
Show the answer and explanation

Answer: D (Mg and Fe only)

Explanation

Magnesium and iron are well above hydrogen and dissolve readily. Copper is below hydrogen, and lead hardly reacts because insoluble lead(II) chloride coats it.