Paper 1 | Objectives | 49 Questions
JAMB Exam
Year: 2017
Level: SHS
Time:
Type: Question Paper
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# | Question | Ans |
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1. |
The general formula of alkanones is A. RCHO B. RCOR' C. RCOOH D. RCOOR
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Detailed SolutionAlkanones also known as ketones have the general formula RCOR'There is an explanation video available below. |
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2. | ||
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4. |
Aluminium hydroxide is used in the dyeing industry as a A. dye B. dispersant C. salt D. mordant |
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5. |
The tincture of iodine means iodine dissolved in A. ethanol B. bromine chloride C. chlorine water D. water |
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6. |
Temporary hard water is formed when rain water containing dissolved carbon(IV) oxide flows over deposits of A. CaCO3 B. Na2CO3 C. Na2SO4 D. CaSO4 |
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8. |
The process that occurs when two equivalent forms of a compound are in equilibrium is A. Isotopy B. Resonance C. Isomerism D. Reforming |
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9. |
In the laboratory preparation of ethyl ethanoate, the water present in the mixture is removed using ? A. Anhydrous CaCl2 B. concentrated NaCO4 C. dilute NaOH D. concentrated H2SO4
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Detailed SolutionTo purify the distillate of impurities like unreacted ethanol, acids, water and ethoxyethane.Adding anhydrous calcium chloride and leave it to stand for a day to remove any water present in the mixture. There is an explanation video available below. |
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10. |
The constituent of air necessary in the rusting process are A. O2 and H2O B. Ar and CO2 C. CO2 and H2O D. O2 and CO2
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Detailed SolutionRust is an iron oxide, a usually red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture.There is an explanation video available below. |
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