Chemical Process
Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement?

Xanthates
Stearic acid
Formic acid
Calcium & aluminium stearate

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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

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

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

None of these
Metallic soaps with frothing agent and free stearic acid to achieve transparency
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 from which glycerine has not been recovered

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Chemical Process
In the manufacture of H₂SO₄, vanadium catalyst as compared to platinum catalyst

Handles lower SO₂ content gas (7 -10% SO₂), thus increasing the capital cost of the plant
Has a longer life and is not poisoned by arsenic
Gives higher conversion efficiency
All of these

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