MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic Chemistryp-Block (group 13 and 14)Previous Year Questions

For which one of the following minerals, the composition given is incorrect? (Kerala CEE 2007)

A.Glauber’s salt – Na2SO4. 10H2O

B.Borax – Na2B4O7.7H2O✓ Correct

C.Cornallite – KCl.MgCl2. 6H2O

D.Soda ash – Na2CO3

Explanation

Na2B4O7.10H2O

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