Chemical Process
Fermentation is adversely affected by the

Absence of air
Presence of ammonium salts
High concentration
Presence of air

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Chemical Process
Pick out the true statement pertaining to water treatment.

Application of activated carbon reduces the temporary hardness of water
Slow sand filters can remove colour completely
Normally, the turbidity is removed by adding a coagulent prior to sedimentation
Activated carbon can be used for taste & odour control without subsequent filtration

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Chemical Process
Transparent soaps (e.g. Pears) are

Usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency
Metallic soaps with frothing agent and free stearic acid to achieve transparency
Metallic soaps with frothing agent from which glycerine has not been recovered
None of these

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