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  2. Question
  3. Chemistry
  4. An aqueous solution of a salt X turns blood red on treatment with SCN- and blue on treatment with K4[Fe(CN)6], X also gives a positive chromyl chloride test. The salt X is :

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Q. An aqueous solution of a salt $X$ turns blood red on treatment with $SCN^-$ and blue on treatment with $K_4[Fe(CN)_6]$, X also gives a positive chromyl chloride test. The salt $X$ is :

JEE MainJEE Main 2015

Solution:

$Fe ^{3+}+ SCN ^{-} \rightarrow \underset{\text{Blood red} }{Fe ( SCN )_{3}}$

$FeCl _{3} \rightarrow$ contains chloride ion it gives chromyl chloride test