Question

27. Although metals form basic oxides, which of the following metals form an amphoteric oxide?

(a) Na


(b) Ca


(c) Al


(d) Cu

28. Which of the following can undergo a chemical reaction?

(a) MgSO4 + Fe


(b) ZnSO4 + Fe


(c) MgSO4 + Pb


(d) CuSO4 + Fe

Answer 1

Explanation:

27. (c) Al

28. (d) CuSO4 + Fe

Answer 2

Answer:

27 c.

28 d.

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