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Q.

Which one is having a maximum percentage of 'Cu' by weight?

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a

Copper glance

b

Copper pyrites

c

Malachite

d

Cuprite

answer is C.

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Detailed Solution

the percentage of copper in  Cu2S,  Cu2OCuFeS2 ​and CuCO3Cu(OH)2 is 79.8,  88.8, 34.5 and 57.3 respectively.

Cuprite Cu2O

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