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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Q. Vinyl chloride (CH₂ = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of

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Q. Soaps remove dirt by

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Q. Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ?

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Q. Chemical name of soda ash is

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Q. A substance produced by a living organism and capable of anti-microbial activity is called a/an

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Q. Deaeration of water in its treatment is necessary, as it

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Q. Hydrochloric acid is also known as

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Q. Aryl benzene sulphonate (ABS) is a

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Q. Adipic acid is an intermediate in the manufacture of

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Q. In multistage equilibrium conversion of SO₂ to SO₃ (2SO₂ + O₂ ↔ 2SO₃), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO₂ to SO₃ can be increased by

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Q. Tall oil obtained as a by-product from the black liquor recovery is

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