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JEE Mains · Chemistry · STD 11 - 8.3. Organic chemistry purification and characterization
Which of the following statements is incorrect ?
- A \(Fe^{3+}\) ion also gives blood red colour with \(SCN^-\) ion.
- B \(Fe^{2+}\) ion also gives blood red colour with \(SCN^-\) ion.
- C On passing \(H_2S\) into \(Na_2ZnO_2\) solution a white ppt of \(ZnS\) is formed.
- D Cupric ion reacts with excess of ammonia solution to give deep blue colour of \([Cu(NH_3)_4]^{2+}\) ion
Answer & Solution
Correct Answer
(A) \(Fe^{3+}\) ion also gives blood red colour with \(SCN^-\) ion.
Step-by-step Solution
Detailed explanation
Only \(Fe^{3+}\) ion gives blood red colouration with \(SCN^-\) ion. \(F{e^{3 + }} + SC{N^ - }\, \to \,\mathop {{{[Fe(SCN)]}^{2 + }}}\limits_{{\text{(dark red)}}} \)
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