Question

MCQ : Which one is a double salt?

  • Acids Bases and Salts
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Answer

Question

Which one is a double salt?

  1. Ca(OCl)Cl (bleaching powder)
  2. NaKCO3
  3. [Cu(NH3)4]SO4
  4. FeSO4.(NH4)2SO4-6H2O (Mohr’s salt)

Answer

FeSO4.(NH4)2SO4.6H2O (Mohr’s salt)

Explanation

FeSO4.(NH4)2SO4.6H2O (Mohr’s salt) is a double salt that forms a blue-green crystalline compound. NaKCO3 is a mixture of two different salts, while Ca(OCl)Cl (bleaching powder) and [Cu(NH3)4]SO4 are not double salts.

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