Chemistry · 2025
JEE Main · 2 April 2025, Shift 1 · Q62
Choose the correct tests with respective observations. (A) CuSO_4 (acidified with acetic acid) + K_4[ Fe ( CN )_6] → Chocolate brown precipitate. (B)…
Choose the correct tests with respective observations.
(A)
$\displaystyle \mathrm{CuSO}_4$ (acidified with acetic acid) $\displaystyle +\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right] \rightarrow$ Chocolate brown precipitate.
(B)
$\displaystyle \mathrm{FeCl}_3+\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right] \rightarrow$ Prussian blue precipitate.
(C)
$\displaystyle \mathrm{ZnCl}_2+\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$, neutralised with $\displaystyle \mathrm{NH}_4 \mathrm{OH} \rightarrow$ White or bluish white precipitate.
(D)
$\displaystyle \mathrm{MgCl}_2+\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right] \rightarrow$ Blue precipitate.
(E)
$\displaystyle \mathrm{BaCl}_2+\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$, neutralised with $\displaystyle \mathrm{NaOH} \rightarrow$ White precipitate.
Choose the correct answer from the options given below :
Official answer
From NTA’s final answer key for this paper.
(1)
A, B and C only
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JEE Main 2025 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.