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Q.

Which of the following statement is incorrect

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a

Most abundant element in earth's crust is oxygen.

b

BaSO4  is called Barytes.

c

MgSO4 .7H2O is called Epsom salt

d

Galena is ZnS

answer is D.

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Detailed Solution

Galena --- PbSZinc blende --- ZnS
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