Question 1.
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.
Answer:
(a) Sodium amalgam, commonly denoted Na(Hg), is an alloy of mercury and sodium.
(b) Bauxite. The molecular formula is Al2O3.H2O
(c) Amphoteric oxides
Eg. Al2O3 is an example of an amphoteric oxide
(d) Ball mill, is often used for grinding an ore and getting enough size reduction.
(e) Graphite is the only non-metal element that is a good conductor of electricity
(f) Aqua Regia, 1:3 mixture of concentrated nitric and hydrochloric acids can dissolve noble metals such as gold, palladium, and platinum.
