Q894
The chemical name of 'Hypo' commonly used in photography is
A.
Sodium thiosulphate
AnswerB.
Silver nitrate
C.
Sodium nitrate
D.
Silver iodide
Answer: Option A
Solution
Answer: Option A
Solution:
An emulsion of sodium thiosulfate is called hypo by photographers. It is used to stop development of exposed film. Thiosulfate converts undeveloped silver bromide grains in the film into water-soluble silver thiosulfate complexes that can be removed when the film is washed.