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Chemistry
Which of the following statements is incorrect ?
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Q. Which of the following statements is
incorrect
?
JEE Main
JEE Main 2013
A
$Fe^{2+}$ ion also gives blood red colour with $SCN$ ion
B
$Fe^{3+}$ 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
Solution:
Only $Fe^{3+}$ ions give blood red colouration with $SCN^-$ ions.
$\ce{Fe^3++SCN^- ->}$$\underset{\text{(dark red)}}{\ce{Fe(SCN)^{2+}}}$