Chemical Process
Refractory bricks burnt at very high temperature have got

Less resistance to corrosion by slags
High spalling tendency
Greater resistance to corrosion by slags
None of these

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

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