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

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Q. Hydrogenation of oil does not

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Q. Main constituents of cotton fiber is

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Q. CaCl(OCl) is the chemical formula of

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Q. In an integrated steel plant, NH₃ present in coke oven gas is normally recovered as

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Q. Flexible foam (for mattresses) is usually made of

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Q. Glycerine is a by-product of the __________ industry.

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Q. One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to

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Q. Permanent hardness of water can be removed by

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Q. Chalcopyrite is the main ore of

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Q. The end bleaching agent used to move last traces of colour bodies from the pulp is

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Q. Bio-degradable detergents

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Q. Sea water contains about __________ ppm of bromine.

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Q. Which allotrope of sulphur is insoluble in carbon disulphide ?

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Q. Enzymes are

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Q. Multistage catalytic converter is not used in the

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Q. __________ is a thermosetting plastic.

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Q. Which of the following is an ore of iron ?

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Q. Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process ?

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Q. High purity nitrogen is used in

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