Chemical Process
Function of sodium thiosulphate (hypo) in development of photographic film/plate is to

Remove metallic silver
Brighten the faint images
Convert silver chloride to silver
Remove unexposed silver halide

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Chemical Process
Comparing sulphate process with sulphite process, we find that __________ in the later.

Pressure is more in the former whereas temperature is less
Both temperature & pressure in the former is less than that
Temperature is more in the former whereas pressure is more
Both temperature & pressure in the former is more than that

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