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.
Destructive distillation of coal means
heating coal in plentiful supply of air
burning coal in air to produce water and carbon (IV) oxide
heating coal in the absence of air
heating coal in limited supply of air
separating coal into various allotropes of carbon
Correct answer is C
No explanation has been provided for this answer.
Neutralization
dehydration
hydrolysis
decomposition
hydrogenation
Correct answer is C
No explanation has been provided for this answer.
Which of the following is likely to have the highest degree of hardness?
Carbonated water
Distilled water
Acidified water
Rain water
Lime water
Correct answer is E
Hardness in water is mainly due to the presence of dissolved minerals such as calcium and magnesium ions, carbonated water, and rainwater with added carbon dioxide either naturally or artificially do not contain a great amount of these dissolved minerals hence they are less likely to have a high degree of hardness compared to lime water which contains calcium ions from the dissolved calcium hydroxide.
Which of the following is not a halogen?
Silicon
Fluorine
Astatine
Bromine
lodine
Correct answer is A
No explanation has been provided for this answer.
The gaseous product formed when ammonia is passed over heated copper (ll) oxide is
oxygen
nitrogen
hydrogen
nitrogen (l) oxide
Correct answer is B
No explanation has been provided for this answer.