Air - Jamb Chemistry Past Questions and Answers

Question 26:

• JAMB 2002

The processes which return carbon (IV) oxide to the atmosphere include

A. Respiration, decay and combustion
B. Photosynthesis, respiration and transpiration
C. Ozone depletion, combustion and decay
D. Photosynthesis, decay and respiration

Question 27:

• JAMB 2002

In the diagram above, the curve that represents the production of oxgyen gas from the decomposition of KCIO₃ in the presence of MnO₂ catalyst is

A. R
B. P
C. S
D. Q

Question 28:

• JAMB 2003

Which of the following statements is true of sulphur (IV) oxide?

A. It forms tetraoxosulphate (VI) acid with water
B. It is an odourless gas
C. It is an acid hybride
D. It forms white precipitate with acidified barium chloride

Question 29:

• JAMB 2005

The property used in the industrial preparation of nitrogen and oxygen from air is

A. Rate of diffusion
B. Density
C. Boiling point
D. Solubility

Question 30:

• JAMB 2006

The characteristic colour of the flame shown when a copper sail moistened with concentrated hydrochloric acid on a platinum wire is put on bunsen burner is

A. Lilac
B. Green
C. Yellow
D. Brick-red