Qualitative Analysis - Result Question 38
Passage
$p$-amino-N, N-dimethylaniline is added to a strongly acidic solution of $X$. The resulting solution is treated with a few drops of aqueous solution of $Y$ to yield blue colouration due to the formation of methylene blue. Treatment of the aqueous solution of $Y$ with the reagent potassium hexacyanoferrate (II) leads to the formation of an intense blue precipitate. The precipitate dissolves on excess addition of the reagent. Similarly, treatment of the solution of $Y$ with the solution of potassium hexacyanoferrate (III) leads to a brown colouration due to the formation of $Z$.
41. The compound $X$, is
(2009, 1M)
(a) $NaNO _3$
(b) $NaCl$
(c) $Na _2 SO _4$
(d) $Na _2 S$
$(2009,1 M)$
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Answer:
Correct Answer: 41. (d)
Solution:
$X$ is $Na _2 S$.
BETA
