Paper 1 | Objectives | 37 Questions
WASSCE/WAEC MAY/JUNE
Year: 1992
Level: SHS
Time:
Type: Question Paper
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# | Question | Ans |
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1. |
When steam is passed over white-hot coke, the products are A. carbon (IV) oxide and nitrogen B. carbon (II) oxide and hydrogen C. carbon (ll) oxide and nitrogen D. carbon (lV) oxide and steam
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Detailed SolutionReaction:C (white hot coke) + H\(_2\)O (steam) → CO + H\(_2\). |
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2. |
The maximum number of electrons that can accommodated in the shell having the principal quantum number 3 is A. 3 B. 9 C. 10 D. 18 E. 32 |
D |
3. |
Methanol is obtained from wood by A. esterification B. bacterial decomposition C. combustion D. fractional distillation E. destructive distillation |
E |
4. |
Study carefully the reaction represented by the equation below. A. Heating the hydrogen peroxide B. Adding a pinch of MnO2 to the reactant C. increasing the concentration of the H2O2 D. Adding water to the reactant E. Exposing the reactant to sunlight |
D |
5. |
Which of the following processes is a physical reaction? A. Electrolysis B. Hydrolysis C. Allotropic change D. Neutralization E. Corrosion |
C |
6. |
If the volume of a given mass of gas at 298 K and pressure of 205.2 x 10\(^3\) Nm\(^{-2}\) is 2.12dm\(^3\), what is volume of the gas at s.t.p? (Standard pressure = 101.3 x 10\(^3\) Nm\(^{-2}\), Standard temperature = 273K) A. 39.3dm 3 B. 22.4dm3 C. 4.93dm3 D. 3.93dm3 E. 0.393dm3
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Detailed SolutionV\(_1\) = 2.12dm\(^3\), V\(_2\) = ?P\(_1\) = 205.2 x 10\(^3\) Nm\(^{-2}\), P\(_2\) = 101.3 x 10\(^3\) Nm\(^{-2}\) T\(_1\) = 293K, T\(_2\) = 273K Using \(\frac{P_1 * V_1}{T_1}\) = \(\frac{P_2 * V_2}{T_2}\) : V\(_2\) = \(\frac{P_1 * V_1 * T_2}{P_2 * T_1}\) → \(\frac{205.2 x 10^3 * 2.12 * 273}{101.3 x 10^3 * 293}\) = 4.0dm\(^3\) |
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7. |
The following acids are monobasic except A. methanoic acid B. dioxonitrate lll acid C. ethanedioic acid D. oxochlorate (l) acid E. hydrobromic acid |
C |
8. |
The reactions ethyne are mainly A. substitution reactions B. addition reactions C. addition polymerization D. catalytic hydrogenation E. catalytic halogenation |
B |
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