A gas is evolved when a piece of zinc metal placed in dilute sulphuric acid (H2SO4). What is the gas?
Biogas consists of mainly
Oxygen on reaction with non-metals forms oxides, which are
The pH of the solution obtained by dissolving pure sodium chloride in water is
A mixture of sodium chloride and naphthalene can be separated by
Chromium oxide is used as an ingredient in paints to obtain