Question

Write names.
a. Alloy of sodium with mercury.
b. Molecular formula of the common ore of aluminium.
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.

Answer 1

a. Sodium amalgam, commonly denoted as Na(Hg), it is an alloy of mercury and sodium.
b. Bauxite(Al₂O₃.2H₂O) is the common ore of aluminium.
c. Metal oxides which react with both acids as well as bases to produce salts and water are also known as amphoteric oxides. For example: Al₂O₃ is an amphoteric oxide. An amphoteric compound is a molecule or ion that can react both an acid as well as a base to produce salt and water.
d. The device used for grinding an ore is grinding mill.
e. Graphite an allotrope of carbon is a good conductor of electricity.
f. Aqua regia is 1:3 mixture of concentrated nitric and hydrochloric acids. It dissolves noble metals such as gold, palladium, and platinum.