Question

A reddish brown coloured metal used in electric wires, when powdered and heated strongly in an open China dish, its colour turns black. When hydrogen gas is passed over this black substances, it regain its original colour. Based on this information, the metal and black coloured substances are *

1 point

(a) copper and copper nitrate

(b) silver and silver oxide

(c) copper and copper oxide

(d) aluminium and aluminium oxide

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Answer 1

Answer:

c) copper and copper oxide