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.
In the diagram above which of the cures illustrates Arrhenius' law?
Y
Z
R
X
Correct answer is D
No explanation has been provided for this answer.
The most suitable metal that can be used as lightning conductor is?
silver
copper
iron
aluminium
Correct answer is B
In reality, silver actually has an even higher electrical conductivity than copper, but silver is too expensive to use.
NH4Cl(s) ↔ NH3(g) + HCL(g)
The reaction above can only attain equilibrium if
a gaseous reactant is added
one of the products is removed
it is in a closed system
it is an open system
Correct answer is C
No explanation has been provided for this answer.
The gas that can be dried using concentrated tetraoxosulphate (VI) acid is
hydrogen bromide
Sulphur (IV) oxide
hydrogen sulphide
ammonia
Correct answer is B
No explanation has been provided for this answer.
N2(g) + 3H2(g) ↔ 2NH3(g) ΔH = -90 kJ
In the equation above, the yield of ammonia can be decreased by
increasing the pressure
removing the ammonia as it is formed
increase the temperature
adding a catalyst
Correct answer is C
No explanation has been provided for this answer.