by Sunday | Dec 27 | Chemistry WAEC
A. A B. B C. C D. D Correct Answer: Option C = C Explanation Boyles law states that the volume of a given mass of gas is inversely proportional to pressure at constant temperature.
by Sunday | Dec 27 | Chemistry WAEC
A. A. Lavoisier B. J. Dalton C. R. Boyle D. J. Proust Correct Answer: Option A = A. Lavoisier Explanation Law of conservation of mass was given by Antoine Lavoisier in 1744. According to this law, “Matter can neither be created nor destroyed in a chemical...
by Sunday | Dec 27 | Chemistry WAEC
A. J. Dalton. B. A. Lavoisier. C. R. Boyle. D. J. J. Thompson. Correct Answer: Option C – R. Boyle. Explanation The word element was first given by Rebert Boyle. It is defined as the simplest chemical substance that cannot be broken down during a chemical...
by Sunday | Dec 27 | Chemistry WAEC
A. absorption property. B. amorphous property. C. oxidizing property. D. adsorption property. Correct Answer: Option D – adsorption property. Explanation Wood charcoal is used to decolourise sugar because it has a highly porous structure, providing a large...
by Sunday | Dec 27 | Chemistry WAEC
A. 40 B. 48 C. 61 D. 101 Correct Answer: Option A = 40 Explanation Molar mass of X(HCO3)2 = X+(1+12+(16*3))2=162 =X + (13+48)2=162 X + 122=162 X=162-122 X=40
by Sunday | Dec 27 | Chemistry WAEC
A. Condensation and diffusion B. Diffusion and evaporation C. Diffusion and sublimation D. Evaporation and condensation Correct Answer: Option D – Evaporation and condensation Explanation Fractional distillation is a series of processes of evaporation and...
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