Paper 1 | Objectives | 80 Questions
JAMB Exam
Year: 2019
Level: SHS
Time:
Type: Question Paper
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# | Question | Ans |
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1. |
A secondary alkanol can be oxidized to give an? A. alkanone B. alkyne C. alkanoic acid D. alkanal
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Detailed Solutionsecondary alkanols (alcohols) can be oxidised to alkanones (ketones)There is an explanation video available below. |
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2. |
Which of the following will give a precipitate with an aqueous solution of copper (I) chloride? A. But-2-ene B. But-1-ene C. But-2-yne D. But-1-yne |
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3. |
The IUPAC name for CH\(_3\)CH\(_2\)COOCH\(_2\)CH\(_3\) is A. methylpropanoate B. ethylethanoate C. ethylpropanoate D. methylethanoate |
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4. |
A certain hydrocarbon on complete combustion at s.t.p produced 89.6dm\(^3\) of CO\(_2\) and 54g of water. The hydrocarbon should be A. C\(_6\)H\(_6\) B. C\(_4\)H\(_{10}\) C. C\(_5\)H\(_{10}\) D. C\(_4\)H\(_6\)
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Detailed SolutionC\(_x\)H\(_y\) + (x + y/4)O\(_2\) \(\to\) x CO\(_2\) + y/2 H\(_2\)O89.6 dm\(^3\) \(\to\) x moles CO\(_2\) 22.4 dm\(^3\) \(\to\) 1 mole CO\(_2\) x = \(\frac{89.6}{22.4}\) = 4 moles CO\(_2\) 54g of H\(_2\)O \(\to\) k moles H\(_2\)O 18g H\(_2\)O \(\to\) 1 mole H\(_2\)O k = \(\frac{54}{18}\) = 3 moles H\(_2\)O From the equation above, x = 4 k = y/2 = 3 y/2 = 3 \(\implies\) y = 6 \(\therefore\) The hydrocarbon C\(_x\)H\(_y\) = C\(_4\)H\(_6\) There is an explanation video available below. |
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5. |
2-methylprop-1-ene is an isomer of? A. 3-methyl but-1-ene B. 2-methyl but-1-ene C. but-2-ene D. pent-2-ene
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Detailed SolutionIsomers of Butene: are But-1-ene, But-2-ene, 2-Methylpropene / 2-methylprop-1-eneThere is an explanation video available below. |
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6. |
Hydrocarbons which will react with Tollen's reagent conform to the general formula A. C\(_n\)H\(_{2n}\) B. C\(_n\)H\(_{2n + 2}\) C. C\(_n\)H\(_{2n - 2}\) D. C\(_n\)H\(_{2n + 1}\)OH |
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7. |
The IUPAC name of the compound CF\(_3\)CHBrCl is A. 2-chloro-2-bromo-1,1,1-trifluoroethane B. 2-bromo-2-chloro-1,1,1-trifluoroethane C. 1-bromo-1-chloro-2,2,2-trifluoroethane D. 1,1,1-trifluoro-2-bromo-2-chloroethane |
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8. |
A synthetic rubber is not obtained from the polymerization of? A. neoprene B. isoprene C. butandiene D. hexane |
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9. |
Burning magnesium ribbon in air removes which of the following A. i and iv only B. i, ii, iii and iv only C. i only D. i and ii only |
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10. |
Which of the following is the best starting material for the preparation of oxygen? Heating of trioxonitrate (v) with A. Pb B. Zn C. Ca D. Na |
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11. |
Which of the following metals is the most essential in the regulation of blood volume, blood pressure and osmotic equilibrium? A. Zinc B. Manganese C. Sodium D. Iron |
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12. |
Which of the following alkaline earth metals react more spontaneously with water? A. Calcium B. Beryllium C. Magnesium D. Strontium
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Detailed SolutionThe Group 2 metals become more reactive towards water as you go down the Group.There is an explanation video available below. |
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13. |
When chlorine water is exposed to bright sunlight, the following products are formed A. HCl\(_{(aq)}\) and Cl\(_2\) B. HOCl\(_{(aq)}\) and Cl\(_2\) C. HCl\(_{(aq)}\) and O\(_2\) D. HOCl\(_{(aq)}\) and O\(_2\) |
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14. |
Which process(es) is/are involved in the turning of starch iodide paper blue-black by chlorine gas? A. chlorine attacks the starch to give the blue-black color B. chlorine attacks the iodide ion to give the blue-black color C. chlorine oxidizes the iodide ion to produce iodine which attacks the starch to give the blue-black color D. iodine attacks the starch to give the blue-black color |
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15. |
Which of the following is a set of neutral oxides? A. N\(_2\)O, H\(_2\)O, CO B. N\(_2\)O, SO\(_2\), CO C. N\(_2\)O, Na\(_2\)O, ZnO D. N\(_2\)O, SO\(_3\), NO |
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16. |
SO\(_3\) is not directly dissolved in water in the industrial preparation of H\(_2\)SO\(_4\) by the contact process because A. SO\(_3\) is an acidic gas B. Acid is usually added to water and not water to acid C. The reaction between SO\(_3\) and water is violently exothermic D. SO\(_3\) does not dissolve readily in water |
Preview displays only 16 out of the 80 Questions