Chemistry 1997 WAEC Past Questions

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In linear molecules, the bond angle is

A. 90^o
B. 140^o
C. 109^o
D. 120^o
E. 180^o

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A sodium atom and a sodium ion have the same

A. number of neutrons
B. number of electrons
C. electric charge
D. electronic structure
E. chemical properties

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If the atomic number of an element X is 11 and that of nitrogen is 7, the most likely formula of the nitride of X is

A. X₃N
B. XN₃
C. X₃N₂
D. N₂X
E. NX₂

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An increase in the pressure of a gas results in a decrease in its

A. mass
B. vapour density
C. volume
D. temperature
E. concentration

View Answer & Discuss (3) WAEC 1997

A given volume of methane diffuses in 20 seconds. How long will it take the same volume of sulphur (IV) oxide to diffuse under the same conditions? [CH4 = 16; SO2 = 64]

A. 5 seconds
B. 20 seconds
C. 40 seconds
D. 60 seconds
E. 80 seconds

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