Multiple choice

The chemical composition of hypo used in photography is

  1. silver bromide

  2. sodium thiosulphate

  3. sodium phosphate

  4. silver nitrate

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

In photography, 'hypo' solution is used as a fixing agent to dissolve unexposed silver halides, and its chemical name is sodium thiosulphate.