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JAMB Chemistry 1995 Question 34

Question 34

Hydrogen, Oxygen and Oxides

In the industrial production of hydrogen from natural gas, carbon (IV) oxide produced along with the hydrogen is removed by

  1. A.washing under pressure
  2. B.passing the mixture into lime water
  3. C.using ammoniacal copper (I) chloride
  4. D.drying over phosphorus (V) oxide
Show the answer and explanation

Answer: A (washing under pressure)

Explanation

CO2 is much more soluble in water under pressure than hydrogen is. Washing the gas with water under pressure dissolves the CO2 cheaply on a large scale.