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AP EAPCET 2021 - 19th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

In Lassaigne’s test for halogens, it is necessary to remove X and Y from the sodium fusion extract, if nitrogen and sulphur are present. This is done by boiling the extract with Z. Identify X, Y and Z.

A
$$X=\mathrm{NaNO}_3, \quad Y=\mathrm{Na}_2 \mathrm{SO}_4, \quad Z= \mathrm{conc}. \mathrm{HNO}_3$$
B
$$X=\mathrm{NaNH}_2, \quad Y=\mathrm{NaSH}, \quad Z= \mathrm{conc}. \mathrm{HCl}$$
C
$$X=\mathrm{Na}_2 \mathrm{NO}_2, Y=\mathrm{NaSO}_3 \mathrm{H}, \quad Z= \mathrm{conc}. \mathrm{H}_2 \mathrm{SO}_4$$
D
$$X=\mathrm{NaCN}, \quad Y=\mathrm{Na}_2 \mathrm{~S}, \quad Z= \mathrm{conc}. \mathrm{HNO}_3$$
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