What is formed when hot copper reacts with oxygen in air?
Oxide
Alloy
Metalloid
Degradation
Black coloured copper oxide is formed when copper reacts with oxygen at very high temperatures. 2Cu+O2→2CuO
Which of the following gas is formed when copper reacts with a hot dilute nitric acid?
Name the products formed when hot and concentrated sulphuric acid reacts with the following :
(a) Sulphur, (b) NaOH, (c) Sugar,
(d) Carbon, (e) Copper.