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A mixture of two salts is not water soluble but dissolves completely in dilute HCI to form a colourless solution. The mixture could be:

Options

  1. AAgNO 3 and KBr
  2. BBaCO 3 and ZnS
  3. CFeSO 4 and Na 2 CO 3
  4. DMn NO 3 2 and MgSO 4

Correct answer

B. BaCO 3 and ZnS

Step-by-step solution

BaCO 3 + ZnS mixture dissolves in HCl but is insoluble in water. Further, the solution in HCl will be colourless due to the formation of soluble BaCl 2 and ZnCl 2 .

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