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.
The function of zinc electrode in a galvanic cells is that it
undergoes reduction
serves as the positive electrode
production of electons
uses up electrons
Correct answer is C
If an external electrical conductor connects the copper and zinc electrodes, zinc from the zinc electrode dissolves into the solution as Zn2+ ions (oxidation), releasing electrons that enter the external conductor.
A chemical reaction which the hydration energy is greater than the lattice energy is referred to as
a spontaneous reaction
an endothermic reaction
an exothermic reaction
a reversible reaction
Correct answer is C
When the hydration energy is greater than the lattice energy, then it is exothermic.
Which of the following is a deliquescent compound?
NaNO3
CaCl2
CuO
Na2CO3.10H2O
Correct answer is B
An effect of thermal pollution on water bodies is that the
volume of water reduces
volume of chemical waste increase
level of oxides of nitrogen increase
level of oxygen reduces
Correct answer is D
No explanation has been provided for this answer.
Which of the following is NOT an alkali?
NH3
Mg(OH)2
Ca(OH)2
NaOH
Correct answer is B
No explanation has been provided for this answer.