Q3 of 53 Page 71

Name the process used for the concentration of the sulphide ore.

Concentration is a process of removal of impurities from the ores. Sulphide ores are normally concentrated by the process of Froth Flotation as these ores possess good wetting and froth forming properties when mixed with frothing agents.


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1

Which of the following elements is a metal?

2

Name one metal and one non-metal which are obtained on a large scale from sea water.

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For the reduction of metal oxide to metal, suggest a reducing agent cheaper than aluminium.

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What is the purpose of adding carbon (C) to molten iron?