|
Which of the following metals form an amphoteric oxide? |
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|
(a) |
Na |
(b) |
Ca |
(c) |
Al |
(d) |
Cu |
|
Which of the following metals form an amphoteric oxide? |
|||||||
|
(a) |
Na |
(b) |
Ca |
(c) |
Al |
(d) |
Cu |