|
A metal is strongly heated in presence of air to form a black mass. So the metal is |
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|
(a) |
potassium |
(b) |
platinum |
(c) |
copper |
(d) |
zinc |
|
A metal is strongly heated in presence of air to form a black mass. So the metal is |
|||||||
|
(a) |
potassium |
(b) |
platinum |
(c) |
copper |
(d) |
zinc |