Which of the following set of elements mostly occur as sulphide ores?
A
Zn, Cu, Na
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B
Zn, Cu, Pb
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C
Fe, AL, Ti
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D
Cu, Ag, Au
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Solution
The correct option is B Zn, Cu, Pb Zn,Cu,Pb mostly occur as sulphide ores.For example, Zn mostly occurs as zincblendeZnS. Cu mostly occurs as Cu2S and CuFeS2. Pb mostly occurs as galenaPbS