Chemical Process
Ordinary glass is not a/an

Material with sharp definite melting point
Supercooled liquid
Amorphous isotropic material
Electrical insulator

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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

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

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Chemical Process
Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils

Cause cholesterol build up and blood clotting
Always contain some amount of nickel (as their complete removal is very difficult)
Are prone to rancid oxidation
Have affinity to retain harmful sulphur compounds

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Chemical Process
Pasteurisation of milk means

Inhibiting the growth of micro-organisms without killing them
Killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics
None of these
Removal of fatty and albuminous substance from it

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