Which of the following will give chromyl chloride test ?KClNaClNH4ClAll
Question
Which of the following will give chromyl chloride test ?KClNaClNH4ClAll
Solution
The chromyl chloride test is a qualitative test for the detection of chloride ions. This test is based on the reaction of chloride ions with chromyl chloride (CrO2Cl2) in the presence of sulfuric acid to produce chromyl chloride vapors, which are reddish-brown in color.
The reaction is as follows:
2NaCl + CrO3 + 2H2SO4 → CrO2Cl2 + 2NaHSO4 + H2O
From the given options, only KCl and NaCl will give the chromyl chloride test because they contain chloride ions. NH4Cl will also give the test as it contains chloride ions.
So, the correct answer is KCl, NaCl, and NH4Cl.
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