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.
Water has the ability to dissolve almost all substance because its molecules has a structure with
one positive end and one neutral end
one positive end and one negative end
two negative ends
two positive ends
Correct answer is B
Water has partial positive and partial negative charges
Which of the following results in the fall of acid rain?
Oxides of lead
Particulate matter
Oxides of sulphur
Gaseous hydrocarbon
Correct answer is C
No explanation has been provided for this answer.
2.0 mol dm-3
3.5 mol dm-3
7.0 mol dm-3
10.0 mol dm-3
Correct answer is A
solubility = mole * 1000cm3/volume
mass/molar mass * 1000cm3/volume
= 34.2/342 * 1000cm3/50cm3-3
The products of the combustion of candle wax are?
hydrogen and water
oxygen and water
carbon (IV) oxide and water
carbon (II) oxide and water
Correct answer is C
The heat of the flame vaporizes the liquid wax (turns it into a hot gas), and starts to break down the hydrocarbons into molecules of hydrogen and carbon. These vaporized molecules are drawn up into the flame, where they react with oxygen from the air to create heat, light, water vapor (H2O) and carbon dioxide (CO2).
An emulsion may be produced by shaking a detergent solution with
palm wine
ethanoic acid
palm oil
water
Correct answer is C
No explanation has been provided for this answer.