Multiple choice

The salt used in gold mining and electroplating is

  1. calcium carbonate

  2. sodium carbonate

  3. sodium acetate

  4. potassium cyanide

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Potassium cyanide is an inorganic compound with the formula KCN. This colorless crystalline compound, similar in appearance to sugar, is highly soluble in water. Most KCN is used in gold mining, organic synthesis, and electroplating. Smaller applications include jewellery for chemical gilding and buffing.