Chemistry 1992 WAEC Past Questions

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When steam is passed over white-hot coke, the products are

A. carbon (IV) oxide and nitrogen
B. carbon (II) oxide and hydrogen
C. carbon (ll) oxide and nitrogen
D. carbon (lV) oxide and steam

View Answer & Discuss (7) WAEC 1992

The maximum number of electrons that can accommodated in the shell having the principal quantum number 3 is

A. 3
B. 9
C. 10
D. 18
E. 32

View Answer & Discuss (6) WAEC 1992

Methanol is obtained from wood by

A. esterification
B. bacterial decomposition
C. combustion
D. fractional distillation
E. destructive distillation

View Answer & Discuss WAEC 1992

Study carefully the reaction represented by the equation below. 2H2O 2(l) → O 2(g) + 2H2O(l). Which of the following will not reaction increase the reaction rate?

A. Heating the hydrogen peroxide
B. Adding a pinch of MnO₂ to the reactant
C. increasing the concentration of the H₂O₂
D. Adding water to the reactant
E. Exposing the reactant to sunlight

View Answer & Discuss (2) WAEC 1992

Which of the following processes is a physical reaction?

A. Electrolysis
B. Hydrolysis
C. Allotropic change
D. Neutralization
E. Corrosion

View Answer & Discuss (2) WAEC 1992

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