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1.
Which of the following ore is best concentrated by froth floatation process?
2.
Extraction of gold and silver involves leaching with CN?. Silver is later recovered by
3.
Which one of the following ore is concentrated by chemical leaching method?
4.
According to Ellingham diagram, the oxidation reaction of carbon to carbon monoxide may be used to reduce which one of the following at lowest temperature?
5.
The first step in extraction of copper from CuFeS? is
6.
Roasted copper pyrites on smelting with sand produces
7.
The composition of copper matte is
8.
?G° vs T plot in the Ellingham's diagram slopes downward for the reaction.
9.
A number of elements are available in earth's crust but most abundant elements are ___________ .
10.
Brine is electrolysed by using inert electrodes. The reaction at anode is ___________ .