Chemistry 2020 WAEC Past Questions

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When 250 cm3 of a saturated solution of CuSO\(_4\) at 30°C was evaporated to dryness, 5.0 g of the salt was obtained..

What is the solubility of the salt at 30°C? [CuSO\(_4\) = 160]

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The bond between NH\(_3\) and H\(^+\) in NH4\(^+\) is?

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Which of the following oxides has a giant covalent structure?

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Which of the following hydroxides is not readily soluble in water?

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Which of the following statements about the solubility of a salt is correct?

A. A salt whose solubility increases with temperature would not crystallize easily on cooling
B. A salt whose solubility is independent of temperature would normally crystallize out on cooling
C. Crystallization would be efficient in separating out a salt whose solubility increases considerably with temperature
D. Solubility of a solid does not affect its crystallization

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