Air - Jamb Chemistry Past Questions and Answers

Question 31:

• JAMB 2006

In the industrial production of H₂ from natural gas the CO₂ produced along with the H₂ is removed by

A. Washing under pressure
B. Drying over phosphorus (V) oxide
C. Passing the mixture into lime water
D. Using ammonical copper (I) chloride

Question 32:

• JAMB 2007

If chlorine is bubbled into water and the resulting yellowish-green solution is exposed to bright sunlight for a while, the solution will decompose giving out

A. Oxygen and leaving behind aqueous hydrochloric acid
B. Chlorine and oxygen
C. Oxygen, hydrogen and chlorine
D. Oxygen, thereby producing hypochlorous acid

Question 33:

• JAMB 2007

The presence of nitrogen in air is to slow down

A. Respiration and combustion
B. Combustion and corrosion
C. Corrosion and respiration
D. Respiration and transpiration

Question 34:

• JAMB 2007

A good drying agent should be

A. Deliquescent
B. Effervescent
C. Hygroscopic
D. Efflorescent

Question 35:

• JAMB 2008

The uncovered raw food that is sold along major roads is likely to contain some amounts of

A. Pb
B. Cu
C. Ag
D. Na