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JEE Main2013ChemistryCoordination CompoundsActual

Which of the following statements is incorrect?

Options

  1. AFe ²⁺ ion also gives blood red colour with SCN ⁻ ion.
  2. BFe ³⁺ ion also gives blood red colour with SCN ⁻ ion.
  3. COn passing H ₂ ~S into Na ₂ ZnO ₂ solution a white ppt of ZnS is formed.
  4. DCupric ion reacts with excess of ammonia solution to give deep blue colour of [ Cu ( NH ₃ )₄ ]²⁺ ion.

Correct answer

A. Fe ²⁺ ion also gives blood red colour with SCN ⁻ ion.

Step-by-step solution

Only Fe ³⁺ ions give blood red colouration with SCN ⁻ ions. Fe ³⁺+ SCN ⁻ gathered [ Fe ( SCN )]²⁺ (dark red) gathered

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