Question 2
WAEC
•
2022
•
CHEMISTRY
•
essay
Question Parts
(
a(i)
)
Define the first ionization energy of an element.
(
a(ii)
)
Consider the following table and use it to answer the question that follows; \( \begin{array}{|l|c|c|c|c|c|c|c|c|}\hline \text{Element} & \text{Li} & \text{Be} & \text{B} & \text{C} & \text{N} & \text{O} & \text{F} & \text{Ne} \\\\ \hline \text{Atomic No.} & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 \\ \hline 1^{\text{st}}\\ I.E / \text{kJ mol}^{-1} & 520 & 900 & 801 & 1086 & 1402 & 1314 & 1681 & 2081 \\ \hline \end{array} \)Explain briefly why the first ionization energy of B is less than that of Be despite the fact that the atomic number of B is greater than that of Be.
(
b
)
When Titanium chloride was electrolysed by passing \( 0.12 A \) current through the solution for 500 seconds, 0.015 g of titanium was deposited. What is the charge on the titanium ion? \[ [\mathrm{IF}=96500 \mathrm{C}, \mathrm{Ti}=48.0] \]
(
c(i)
)
Aluminium can be obtained by the application of electrolysis. State the electrolyte which yields aluminium on electrolysis.
(
c(ii)
)
Name two major factors which would favour the siting of an aluminium smelter in a country.
(
d(i)
)
Define the term paramagnetism.
(
d(ii)(1)
)
Consider the following ions: \[ 24^{\mathrm{Cr}^{2+}}, 24^{\mathrm{Cr}^{6+}} \] Deduce the number of unpaired electrons in each of the ions.
(
d(ii)(II)
)
State which of the ions will have a greater power of paramagnetism.
(
d(iii)
)
Give a reason for the answer stated in 2d(ii)(II).
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About This Question
This is
Waec
2022
Chemistry
Question 2.
It is one of the
essay
questions from the
2022
Waec
Chemistry
examination.
The question covers
General
.