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In brown ring Fe and NO exist as Fe + and NO + rather than Fe 2 + and NO. These forms can be differentiated by

Options

  1. AMeasuring the conductivity of an aqueous solution of the complex
  2. BBy careful crystallization of the complex under special conditions and measuring the magnetic moment in solid
  3. CEstimating the concentration of iron
  4. DDetermining elevation in boiling point using the complex as solute

Correct answer

B. By careful crystallization of the complex under special conditions and measuring the magnetic moment in solid

Step-by-step solution

When the combination is Fe 2 + and NO, there will be 5 unpaired electrons in the complex ( 4 in Fe 2 + and 1 in NO) and when the combination is Fe + and NO + , there will be only 3 unpaired electrons which can be differentiated by measuring the magnetic moments.

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