Chemical Process
Ultimate analysis of coal determines its __________ content.

Carbon, volatile matter, ash & moisture
Carbon, ash, sulphur & nitrogen
Carbon, hydrogen, nitrogen & sulphur
Carbon, sulphur, volatile matter & ash

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Chemical Process
Nylon 66 is so named because the

Number of nitrogen atoms between two carbon atoms are 6
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

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Chemical Process
Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its

All of these
Hydrolysis tendency in presence of water
Poor oxidation stability and high gum forming tendency
Greater tendency of decomposition at elevated temperature

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