Multiple choice

A photosensitive substance is responsive to light or other radiant energy. Which of the following is a photosensitive solid?

  1. Germanium telluride

  2. Gold(III) chloride

  3. Gold(I, III) chloride

  4. Gold(III) fluoride

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

Gold(I, III) chloride is a black solid with chemical formula Au4Cl8 that contains gold in two different oxidation states - +1 and +3. It is a photosensitive solid and should be kept away from light and stored in dark-coloured containers.