Chemistry
Paper 1 | Objectives | 50 Questions
WASSCE/WAEC MAY/JUNE
Year: 2019
Level: SHS
Time:
Type: Question Paper
Source: Nigeria
Answers provided
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Paper 1 | Objectives | 50 Questions
WASSCE/WAEC MAY/JUNE
Year: 2019
Level: SHS
Time:
Type: Question Paper
Source: Nigeria
Answers provided
No description provided
This paper is yet to be rated
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| # | Question | Ans |
|---|---|---|
| 1. |
The periodic table is an arrangement of elements according to their? A. Oxidation number B. Atomic number C. Mass number D. Nunber of neutrons
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Detailed SolutionElements are arranged in order of increasing atomic number |
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| 2. |
A solid with higher melting and boiling points is likely to be? A. Covalent compound B. A Dative compound C. An Electrovalent compound D. A Non-metal
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Detailed SolutionIonic Compounds / Electrovalent compounds Have A High Melting Point and High Boiling Point. |
|
| 3. |
Which of the following metals reacts slowly with cold water? A. Iron B. Silver C. Calcium D. Pottassium
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Detailed SolutionCalcium reacts very slowly with cold water |
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| 4. |
Which of the following elements has the highest ionization energy? A. Calcium B. Chlorine C. Flourine D. Magnesium |
D |
| 5. |
The bleaching action of chlorine is through the process? A. Hydration B. Hydrolysis C. Reduction D. Oxidation
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Detailed SolutionThe bleaching action lof chlorinr is due to its ability to react with water to form oxochlorate(i)acid |
|
| 6. |
If 6.5g of magnesium ribbon reacts completely with Hydrochloric acid, how many grams of hydrogen gas would be liberated?Mg(s) + 2 HCl(aq) --> MgCl 2(aq) + H 2(g)[ H = 1.0, Mg = 24.0 ] A. 0.54g B. 0.70g C. 1.08g D. 1.40g
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Detailed Solution24g of Mg will liberate 2g of H: 6.5g of Mg will liberate Xg of H = ( 6.5 X 2 ) / 24 = 0.5416g of Hygrogen ( H ) |
|
| 7. |
Calcium and magnesium belong to the group of the periodic table because both? A. are metals B. form cations C. form colourless salts D. have same number of valence electrons |
D |
| 8. |
Which of the substances is non-polar? A. Bromine B. Ammonia C. Water D. Hydrogen Bromide
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Detailed SolutionBr2 (Bromine) is nonpolar because, in this molecule, both bromine atoms have the same electronegativity due to which both atoms have equal charge distribution and results in a net-zero dipole moment. |
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| 9. |
Which of the following pairs of components have the same molecular mass?[ H = 1.0, C = 12.0, O = 16.0 ] A. Ethene and Ethyne B. Ethane and Ethene C. Carbon (ii) Oxide and Ethene D. Carbon (iv) Oxide and Ethyne
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Detailed SolutionEthene = 28Ethyne = 26 Carbon(ii)Oxide = 28 Carbon(iv)Oxide = 44 |
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| 10. |
When an equilibrium is established between dissolved and undissolved solutes, the solution is said to be? A. Saturated B. Unsaturated C. Concentrated D. Diluted
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Detailed SolutionThe term saturated solution is defined in chemistry as a solution in which no more solute can be dissolved in the solvent. |
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