Ore concentration by froth floatation utilises the ______________ of ore particles ?

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Acrylonitrile is mainly used in the _____________ industry?

A. Polymer B. Printing C. Dyeing D. Photographic...

Flux addition during smelting of ore is done to___________________?

A. Remove impurities/gangue B. Enhance rate of reaction C. Accelerate reduction of ore D. Separate slag from metal...

The yield of tar from high temperature carbonisation of dry coal is about _______________ percent?

A. 3 B. 12 C. 22 D. 0.3...

Which of the following coals has the highest calorific value ?

A. Lignite B. Sub-bituminous C. Anthracite D. Peat...

Which of the following is not an antibiotic ?

A. Penicillin B. Streptomycin C. Tetracycline D. Quinine...