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JAMB Chemistry 2007 Question 4

Question 4

Qualitative Analysis

A solution which on treatment with hydrochloric acid produces a colourless, odourless gas which turns lime water milky is most likely to be a

  1. A.trioxonitrate(V)
  2. B.chloride
  3. C.trioxocarbonate(IV)
  4. D.hydroxide.
Show the answer and explanation

Answer: C (trioxocarbonate(IV))

Explanation

Acids react with trioxocarbonates(IV) (carbonates) to release CO2, a colourless, odourless gas that turns lime water milky.