Multiple choice

Hypo, used in photography is chemically

  1. Sodium bicarbonate

  2. Sodium thiosulphate

  3. Sodium nitrate

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In photography, hypo is a chemical used as a fixing agent to dissolve unexposed silver halides from photographic film or paper. Chemically, it is sodium thiosulphate.

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