Chemical Process
Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process.

Sulphate/kraft
Mechanical
Sulphite
Neutral sulphite semi-chemical

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Chemical Process
One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to

Adjust the pH of the syrup
Reduce the viscosity of the syrup
Improve the rate of crystallisation of sugar
Remove the coloring matter from the syrup

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

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

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Chemical Process
Pick out the wrong statement pertaining to the soap manufacture.

Colourless rosin is used in the manufacture of laundary soaps
Transparent soaps are made by cold process
Both laundary as well as toilet soaps are manufactured by hot process
Organic pigments are used as colouring materials in the soap manufacture

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