Chemical Process
Nylon 66 is so named because the

Polymer was first synthesised in 1966
Number of carbon atoms between two nitrogen atoms are 6
Average degree of polymerisation of the polymer is 1966
Number of nitrogen atoms between two carbon atoms are 6

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Chemical Process
Shaving soaps are

Metalic soaps compounded with frothing agents
Soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property
None of these
High free alkali soaps having excess of cane sugar and alcohol

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