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Q.

Select the correct statements:

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a

In hydrometallurgy, Zn is used as oxidising agent in the purification of Ag from Ag(CN)2⊖.

b

When pine oil or eucalyptus oil is added into the water, it lowers down the surface tension by which froth is formed

c

Sodium ethyl xanthate is used as collector

d

Basic copper carbonate or PbSO4 is concentrated by froth flotation method by using an activator

answer is .

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Detailed Solution

Hydrometallurgy is a chemical metallurgy method that conducts separation and extraction of metals based on reaction in aqueous medium.
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