Chemical Process
__________ is the major constituent of the Portland cement.

Calcium sulphate
Tricalcium silicate
Calcium oxide
Calcium carbonate

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Chemical Process
Unsaturated oils compared to saturated oils have

Higher melting point & higher reactivity to oxygen
Lower melting point & lower reactivity to oxygen
Higher melting point & lower reactivity to oxygen
Lower melting point & higher reactivity to oxygen

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