Make pairs of substances and their properties

Write names.

a. Alloy of sodium with mercury.

b. Molecular formula of the common ore of aluminum.

c. The oxide that forms salt and water by reacting with both acid and base.

d. The device used for grinding an ore.

e. The nonmetal having electrical conductivity.

f. The reagent that dissolves noble metals.

Identify the pairs of metals and their ores from the following.

Explain the terms.

a. Metallurgy

b. Ores

c. Minerals

d. Gangue

Write scientific reason.

Lemon or tamarind is used for cleaning copper vessels turned greenish.