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.
Group 1 A metals are not found free in nature because they?
are of low melting and boiling points
have weak metallic bondingconduct electricity and heat
conduct electricity and heat
are very reactive
Correct answer is D
No explanation has been provided for this answer.
Which of the following compounds will impart a brick-red colour to a non-luminious bunsen flame?
NaCl
LiCl
CaCl2
MgCl2
Correct answer is C
No explanation has been provided for this answer.
In the extraction of iron in the blast furnace, limestone is used to?
release CO2 for the reaction
reduce the iron ore
increase the strenght of the iron
remove impurities
Correct answer is D
No explanation has been provided for this answer.
Ca2+
Mg2+
Zn2+
Cu2+
Correct answer is C
No explanation has been provided for this answer.
A gas that will turn orange potassium heptaoxodichromate (lV) solution to clear green is?
sulphur (ii) oxide
hydrogen sulphide
sulphide (lV) oxide
hydrogen chloride
Correct answer is A
No explanation has been provided for this answer.