Question

Hydrochloric acid is used in
a) purifying precious metals like goldb) refining petrolc) purifying common saltd) preparing soft drinks

Answer 1

a >to purify precious metal

Answer 2

The correct answer to the question will be, “Hydrochloric acid is used in purifying common salt”.

Common salt is also considered as the neutral substance whereas hydrochloric acid is extremely strong acids that are used for the purification.

These can easily dissolve the precious metal and the noble metals as per their properties.