Year :
2003
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
1 - 10 of 37 Questions
| # | Question | Ans |
|---|---|---|
| 1. |
The electronic configuration of an element is 1s 22s22p63s 2 A. Group lll, period 3 B. Group lll, period 5 C. Group V, period 3 D. Group V, period 5 |
C |
| 2. |
Group O of elements are unreactive because A. their outmost shells contain equal number of electrons B. their highest occupied enegy level is full C. they are monatomic gases D. they are non-metals |
B |
| 3. |
An element X with electronic configuration 1s22s22p 63s 23p5combines with another element Y with the configuration 1s2s22p23s33p5. What is the formula of the compound formed? A. X2Y5 B. X2Y3 C. XY3 D. XY2 |
D |
| 4. |
Which of the following statements about dative bonding is not correct? A. there is sharing of electrons B. one atom must possess a lone pair electrons C. each participating atom contributes one electron D. it can be formed between molecules |
C |
| 5. |
Which of the following quantities is the same for one mole of Br2(l) and one mole of He(g)? A. Number of molecules B. Number of atoms C. Total mass of the particles D. Volume occupied at s.t.p |
A |
| 6. |
Which of the following acids is dibasic? A. Hydrochloric acid B. Trioxosulphate (IV) acid C. Dioxonitrate (lll) acid D. Ethanoic acid |
B |
| 7. |
Bees inject an acidic substance when they sting. Which of the following chemical could be used to treat bee stings? A. CH3COOH B. NaHCO3 C. C2H5OH D. H2O2 Detailed SolutionBees on the other hand have acidic toxins in their stings, and so an alkaline solution should be applied to neutralize them. Baking soda (\(NaHCO_{3}\)) mixed with cold water is usually the most effective way of making an alkaline solution. |
|
| 8. |
Which of the following salts can be prepared by reacting the metal with dilute H2SO4? A. CuSO4 B. MgSO4 C. BaSO4 D. PbSO4 |
B |
| 9. |
Which of the following solutions will give a precipitate with dilute tetraoxosulphate (V) acid? l. Lead (ll) trioxonitrate (V) solution ll. Barium chloride solution lll. Sodium chloride solution A. l only B. ll only C. l and ll only D. ll and lll only |
B |
| 10. |
Substance Q reacts with cold water to form a solution which turns red litmus blue. Substance Q could be A. zinc B. phosphorus C. lead D. sodium |
D |
| 1. |
The electronic configuration of an element is 1s 22s22p63s 2 A. Group lll, period 3 B. Group lll, period 5 C. Group V, period 3 D. Group V, period 5 |
C |
| 2. |
Group O of elements are unreactive because A. their outmost shells contain equal number of electrons B. their highest occupied enegy level is full C. they are monatomic gases D. they are non-metals |
B |
| 3. |
An element X with electronic configuration 1s22s22p 63s 23p5combines with another element Y with the configuration 1s2s22p23s33p5. What is the formula of the compound formed? A. X2Y5 B. X2Y3 C. XY3 D. XY2 |
D |
| 4. |
Which of the following statements about dative bonding is not correct? A. there is sharing of electrons B. one atom must possess a lone pair electrons C. each participating atom contributes one electron D. it can be formed between molecules |
C |
| 5. |
Which of the following quantities is the same for one mole of Br2(l) and one mole of He(g)? A. Number of molecules B. Number of atoms C. Total mass of the particles D. Volume occupied at s.t.p |
A |
| 6. |
Which of the following acids is dibasic? A. Hydrochloric acid B. Trioxosulphate (IV) acid C. Dioxonitrate (lll) acid D. Ethanoic acid |
B |
| 7. |
Bees inject an acidic substance when they sting. Which of the following chemical could be used to treat bee stings? A. CH3COOH B. NaHCO3 C. C2H5OH D. H2O2 Detailed SolutionBees on the other hand have acidic toxins in their stings, and so an alkaline solution should be applied to neutralize them. Baking soda (\(NaHCO_{3}\)) mixed with cold water is usually the most effective way of making an alkaline solution. |
|
| 8. |
Which of the following salts can be prepared by reacting the metal with dilute H2SO4? A. CuSO4 B. MgSO4 C. BaSO4 D. PbSO4 |
B |
| 9. |
Which of the following solutions will give a precipitate with dilute tetraoxosulphate (V) acid? l. Lead (ll) trioxonitrate (V) solution ll. Barium chloride solution lll. Sodium chloride solution A. l only B. ll only C. l and ll only D. ll and lll only |
B |
| 10. |
Substance Q reacts with cold water to form a solution which turns red litmus blue. Substance Q could be A. zinc B. phosphorus C. lead D. sodium |
D |