Chemistry Practice Test – Metals and their Compounds

When iron is finely divided, it will burn in oxygen to form the magnetic oxide with formula:

A. Fe₂O₃    B. FeO    C. Fe₃O₄    D. Fe₂O₃. 3H₂O

The alloy used as gold dental contains gold plus _______

A. lead and tin.     B. iron and carbon.    C. copper and silver     D. aluminium and copper

Which of these is not an alloy of lead?

A. soft solder     B. pewter     C. type metal.     D. manganin

Metallic elements that give coloured salts in aqueous solution are called _______

A. alkali metals.     B. transition elements.       C. S-block metals.    D. noble elements

The best way of distinguishing between NaHCO₃ and Na₂CO₃ is by ______

A. heating.     B. adding an alkali        C. adding an acid     D. exposing to air