by Sunday | Dec 27 | Chemistry WAEC
A. Tetraoxosulphate(VI) acid B. Trioxonitrate(V) acid C. Tetraoxophosphate(V) acid D. Trioxosulphate(IV) acid Correct Answer: Option A – Tetraoxosulphate(VI) acid Explanation Normal salts are formed when all the replaceable hydrogen ions in the acid have been...
by Sunday | Dec 27 | Chemistry WAEC
A. a basic oxide B. a reducing agent C. an acidic oxide D. an oxidizing agent Correct Answer: Option C – an acidic oxide Explanation Silicon dioxide is an acidic oxide. It will react with strong bases to form silicate salts, SiO2 is acidic oxide because Si is...
by Sunday | Dec 27 | Chemistry WAEC
A. ionization of reactant particles B. breakage of bonds of products C. breakage of bonds of reactants C. ionization of product particles Correct Answer: Option C – breakage of bonds of reactants Explanation Activation energy must be achieved before reaction...
by Sunday | Dec 27 | Chemistry WAEC
A. SO4 2− ions B. SO3 2− ions C. NO3− ions D. SO3 2− ions Correct Answer: Option D – SO3 2− ions Explanation Effervescence is the formation of gas bubbles in a liquid by a chemical reaction. An example of effervescence is the release of carbon dioxide which...
by Sunday | Dec 27 | Chemistry WAEC
A. decreases the solubility of a solid in a liquid but increases the solubility of a gas in a liquid. B. increases the solubility of a solid in a liquid but decreases the solubility of a gas in a liquid. C. increases the solubility of both a solid and a gas in a...
by Sunday | Dec 27 | Chemistry WAEC
A. Marble chips and 2.0 mol dm−3 HCl(aq) B. Marble chips and 2.5 mol dm−3 HCl(aq) C. Powdered marble and 2.5 mol dm−3 HCl(aq) D. Powdered marble and 2.0 mol dm−3 HCl(aq) Correct Answer: Option C – Powdered marble and 2.5 mol dm−3 HCl(aq) Explanation Powdered...
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