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.
The gas obtained as a product of anaerobic action on organic matter buried in the earth is?
ethene
methane
carbon (IV) oxide
nitrogen (IV) oxide
Correct answer is B
he organic material (or organics) within the low-oxygen environment of landfills also undergoes anaerobic digestion, producing methane.
Which of the following typically represents a photochemical reaction?
Formation of water from hydrogen and oxygen molecules
Conversion of dinitrogen (IV) oxide to nitrogen (IV) oxide
Decomposition of calcium hydroxide to its oxide
Conversion of silver halides to grey metallic silver
Correct answer is D
No explanation has been provided for this answer.
The sulphide which is insoluble in dilute hydrochloric acid is
FeS
CuS
ZnS
Na2S
Correct answer is B
No explanation has been provided for this answer.
In the industrial production of H2 from natural gas the CO2 produced along with the H2 is removed by
washing under pressure
drying over phosphorus (V) oxide
passing the mixture into lime water
using ammonical copper (I) chloride
Correct answer is A
No explanation has been provided for this answer.
lilac
green
yellow
brick-red
Correct answer is B
No explanation has been provided for this answer.