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Chemical Process

Chemical Process
__________ is used as a flux in the smelting of copper ore like chalcopyrite.

Dolomite
Silica/quartz
Coke breeze
Lime powder

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Chemical Process
Phthalic anhydride is made by the

Oxidation of naphthalene
Oxidation of benzene
None of these
Dehydrogenation of ethyl benzene

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Chemical Process
Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc?

Sodium borate
Caustic soda
Sodium silicate
Sodium tripolyphosphate (STPP)

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Chemical Process
Which of the following is an yellow pigment?

Zinc sulphides
Lead chromates
Ferrous sulphate
Titanium dioxide

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Chemical Process
Which of the following is a constituent of coffee?

Caffeine
Nicotine
Lignin
Calgon

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Chemical Process
Dry ice (solidified CO₂) is used for the

None of these
Storage & shipment of frozen foods and ice-creams
Liquefaction of permanent gases
Liquefaction of natural gas

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