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BITSAT 2015

Exam: BITSAT
Year: 2015
Subject: Chemistry
Chapter: Practical Chemistry

BITSAT 2015 · Chemistry · Practical Chemistry

K_ 4 [Fe(CN)_ 6 ] is used in detecting.

\mathrm{K}_{4} \left[\mathrm{Fe}(\mathrm{CN})_{6}\right] is used in detecting.

Options

A $\mathrm{Fe}^{3+} \mathrm{ion}$
B $\mathrm{Cu}^{+} \mathrm{ion}$
C $\mathrm{Cu}^{3+}$ ion
D $\mathrm{Fe}^{2+}$ ion

Correct answer

A. $\mathrm{Fe}^{3+} \mathrm{ion}$

Step-by-step solution

\mathrm{Fe}^{3+}

ion can be detected by

\mathrm{K}_{4} \left[\mathrm{Fe}(\mathrm{CN})_{6}\right]

\begin{aligned}4 \mathrm{Fe}^{3+}+3 \mathrm{ K}_{4} \left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\\ & \longrightarrow \mathrm{Fe}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]_{3}+12 \mathrm{ K}^{+} \end{aligned}

$$

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