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 :

Question

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 : (A) CuCl2 (B) FeCl3 (C) Cu(NO3)2 (D) Fe(NO3)3

Tardigrade Admin · Accepted Answer

Fe 3++ SCN - arrow underset textBlood red Fe ( SCN )3 FeCl 3 arrow contains chloride ion it gives chromyl chloride test

Q. An aqueous solution of a salt $X$ turns blood red on treatment with $SC N^{-}$ and blue on treatment with $K_{4} [F e (CN)_{6}]$ , X also gives a positive chromyl chloride test. The salt $X$ is :

$C u C l_{2}$

$F e C l_{3}$

$C u (N O_{3})_{2}$

$F e (N O_{3})_{3}$

$F e^{3 +} + SC N^{-} \to Blood red F e (SCN)_{3}$

$F e C l_{3} \to$ contains chloride ion it gives chromyl chloride test

Q. 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 :

CuCl2​

FeCl3​

Cu(NO3​)2​

Fe(NO3​)3​