Q. Pick out the wrong statement.

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Q. Concentration of sulphide ores is done usually by

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Q. Sodium carbonate (soda ash) is not used in the manufacture of

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Q. Viscose rayon

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Q. Nylon 6-6 is manufactured from

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Q. Glauber's salt is chemically represented by

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Q. Chemical name of Grignard reagent is

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Q. Which of the following processes is absent in glass manufacturing process ?

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Q. Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood.

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Q. Nitrogen is an essential component of

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Q. Bromine content in sea water may be around __________ ppm.

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Q. Argon is the third largest constituent of air (followed by N₂ & O₂). Its percentage by volume in air is

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Q. Poly tetraflouro ethylene (P.T.F.E.) is known as

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Q. Bakelite is

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Q. __________ is produced by the dehydrogenation of ethyl benzene.

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Q. Which of the following is used as a coagulant in water treatment ?

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Q. __________ paper is used in the manufacture of newsprint paper.

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Q. Hydrodenation of vegetable oils is a/an __________ reaction.

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Q. Permanent hardness of water is due to the presence of calcium & magnesium

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Q. The temperature in the calcium carbide furnace is __________ °C.

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