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CHEMICAL PROCESS

Chemical Process
Which of the following processes can remove both temporary as well as permanent hardness of water?

Distillation
None of these
Boiling
Filtration

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Chemical Process
Which of the following is not responsible for causing permanent hardness of water?

MgCl₂
None of these
Ca(HCO₃)₂
CaCl₂

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

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

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Chemical Process
Liquor poisoning generally occurs due to the presence of __________ in it.

Methyl alcohol
Ethyl alcohol
Carbonic acid
Impurities

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Chemical Process
Sulphur removal by heating of pyrite ore in presence of air is called its

Reduction
Smelting
Roasting
Calcination

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