2000
In which of the following is the oxidation number of sulphur equal to -2?
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2000 JAMB UTME Chemistry Past Questions
2000
50 cm3 of carbon (II) oxide was exploded with 150 cm3 of air containing 20% oxygen by volume. Which of the reactants was in excess?
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2000
Which of the following compounds is composed of Al, Si, O and H?
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2000
Sieving is a technique used to separate mixture containing solid particles of
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2000
A mixture of iodine and sulphur crystals can be separated by treatment with
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2000
Which of the following statement is correct about the periodic table?
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2000
The fundamental difference between the three states of matter is the
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2000
The partial pressure of oxygen in a sample of air is 452 mm Hg and the total pressure is 780 mm Hg. What is the mole fraction of oxygen?
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2000
The ratio of the initial to final pressure of a given mass of gas is 1:1.5. Calculate the final volume of the gas if the initial volume was 300 cm3 at the same temperature
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2000
How many moles HCL will be required to react with potassium heptaoxodichromate (VI) to produce 3 moles of chlorine?
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2000
The distance between the nuclei of chlorine atoms in a chlorine molecule is 0.194 mm. The atomic radius of chlorine atom is
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2000
The shapes of CO2, H2O and CH 4 respectively are
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2000
The knowledge of half-life can be used to
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2000
Which of the following types of bonding does not involve the formation of new substance?
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2000
The electron configuration of 22X 2+ ion is
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2000
1.0 dm3 of distilled water was used to wash 2.0g of a precipitate of AgCl. If the solubility product of AgCl is 2.0 * 10-10mol2dm-6, what quantity of silver was lost in the process?
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2000
The air pollutant unknown in nature is
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2000
Water molecule can be ligands especially when they are bonded to
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2000
A side effect of soft water is that
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2000
The noble gas, argon,is used for
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