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JAMB Chemistry 2002 Question 26

Question 26

Nitrogen and its Compounds

The gas that gives brown colouration in brown ring test is

  1. A.NO
  2. B.CO2
  3. C.NO2
  4. D.CO
Show the answer and explanation

Answer: A (NO)

Explanation

In the brown ring test for nitrates, the nitrate is reduced to NO, which combines with iron (II) sulphate to form the brown complex FeSO4·NO.