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Q.

Among the following statements the incorrect one is

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21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya

a

Calamine and siderite are carbonates

b

Argentite and cuprite are oxides

c

Zinc blende and iron pyrites are sulphides

d

Malachite and azurite are ores of copper

answer is B.

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Detailed Solution

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                             Calamine(ZnCO3), Siderite(FeCO3)

                             Argentite(Ag2S), Cuprite(Cu2O)

                             Zinc blende(ZnS), Iron pyrites(FeS2)

                             Malachite(CuCO3.Cu(OH)2) and azurite 2(CuCO3.Cu(OH)2)

Hence, option (B) is correct.

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Among the following statements the incorrect one is