Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.
linear
planar
pyramidal
tetrahedral
Correct answer is D
No explanation has been provided for this answer.
Which of the following substances is mainly responsible for the depletion of the ozone layer?
Oxgyen
Chlorofluorocarbon
Carbon (ll) oxide
Nitrogen (ll) oxide
Correct answer is B
Ozone depletion occurs when chlorofluorocarbons (CFCs) and halons—gases formerly found in aerosol spray cans and refrigerants—are released into the atmosphere
Cu and Sn
Cu and Zn
Cu and Mg
Cu and Pb
Correct answer is B
Brass is an alloy made from copper and zinc. Unlike pure metals, most alloys do not have a single melting point, but a melting range in which the material is a mixture of solid and liquid phases.
A metal that is widely used in the manufacture of paints and overhead electric cables is
aluminium
copper
iron
lead
Correct answer is A
No explanation has been provided for this answer.
Which of the following pollutants is not usually recycled?
Aluminium cans
Glass bottles
Nuclear wastes
Paper wastes
Correct answer is C
No explanation has been provided for this answer.