Chemical Process
Nylon 66 is so named because the

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

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Chemical Process
Fusel oil is a/an

Essential oil
Extract from medicinal herbs
Mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses)
None of these

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