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General Science

General Science
Non stick cooking utensils are coated with

PVC
polystyrene
Teflon
Black paint

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General Science
'Bar' is the unit of

Temperature
Current
Atmospheric pressure
Heat

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General Science
Gypsum is added to cement clinker to

Bind the particles of calcium silicate
Facilitate the formation of colloidal gel
Increase the tensile strength of cement
Decrease the rate of setting of cement

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General Science
Permanent hardness of water may be removed by the addition of

Potassium Permanganate
Lime
Alum
Sodium Carbonate

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General Science
The group of metals Fe, Co, Ni may best called as

Transition metals
Rare metals
Main group metals
Alkali metals

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General Science
The chemical (Ethyl Mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of

Chlorine
Sulphur
Bromine
Fluorine

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