Non-metals form two types of oxides. Choose these two types from the following oxides:
$SO_2, NO_2, CO, H_2O, N_2O$

Which of the following metals is the most reactive?

Which process occurs at the anode during the process of electrolysis?

Give reasons for the following:
$(a)$ We can store copper sulphate solution in a silver vessel but not silver nitrate solution in a copper vessel.
$(b)$ The reaction of zinc with dilute nitric acid does not produce hydrogen gas.
$(c)$ Food cans are coated with tin rather than zinc.

Which gas is useful for inhibiting bacterial growth?

An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be: