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.
32
64
128
256
Correct answer is C
No explanation has been provided for this answer.
The main difference between a primary cell and a secondary cell is that the primary cell
is an electrolytic cell but the secondary is not
cannot be recharged but the secondary cell can
can be recharged but the secondary cell cannot
contains electrodes but the secondary cell does not
Correct answer is B
No explanation has been provided for this answer.
Which of the elements will burn in excess oxygen to form a product that is neutral to litmus?
Carbon
Hydrogen
Sulphur
Sodium
Correct answer is B
No explanation has been provided for this answer.
Which of the following reactions is sulphur (IV) oxidizing agent?
2HNO 3(aq) + SO2(g) → H2SO4(aq) + 2NO2(g)
2KMnO 4(aq) + 5SO2(g) + 2H2O → K2SO4(aq) +MnSO4(aq) 2H2SO4(aq)
FeCI3(aq) + SO2(g) + 2H2O(l) → FeCI 2(g)+ 2HCI(g) + H2SO4(aq)
2H2S(g) + SO2(g) →2H2O(l) + 3S(s)
Correct answer is B
It also reduces potassium permanganate and dichromate to Mn2+ and Cr3+ respectively.
Which of the following methods is suitable for preparing insoluble salts?
Thermal decomposition
Oxidation
Double decomposition
Neutralization
Correct answer is C
No explanation has been provided for this answer.