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, R is a mixture of?
potassium tetraxochlorate (VII) and concentrated H2SO4
potassium trioxochlorate (V) and concentrated H2SO4
potassium tetratoxomanganate (VII) and concentrated HCI
manganes (IV) oxide and concentrated HCI
Correct answer is D
No explanation has been provided for this answer.
L
M
N
P
Correct answer is D
The concentration of the \(CaCO_3\) decreases as reaction time decreases. therefore option D is correct.
In the diagram above the activation energy is represented by
y - x
x
x - z
y
Correct answer is A
No explanation has been provided for this answer.
The ∆H for the reaction represented by the energy profile above is
-100 kJ mol--1
+ 100 kJ mol-1
+50 kJ mol-1
-50 kJ mol-1
Correct answer is D
No explanation has been provided for this answer.
The set-up above would be useful for determining the amount of
oxygen in air
water vapour in air
CO2 in air
arygen in air
Correct answer is B
No explanation has been provided for this answer.