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.
- COn passing $H_2S$ into $Na_2ZnO_2$ solution a white ppt of $ZnS$ is formed.
- DCupric ion reacts with excess of ammonia solution to give deep blue colour of $[Cu(NH_3)_4]^{2+}$ ion.
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