ElectrochemistryOxidation Number36Choose the best answerThe apparent charge assigned to an atom in a molecule or ion is called its:AValencyBCoordination numberCOxidation numberDAtomic number Like 0 Discuss 0Share
ElectrochemistryOxidation Number37Choose the best answerThe oxidation number of an element in a species may be:APositiveBZero or fractionalCNegativeDAll of these Like 0 Discuss 0Share
ElectrochemistryRules and Exceptions of Oxidation Number38Choose the best answerThe oxidation state of oxygen in KO₂ is:A−1/2B−2C−1D−3 Like 0 Discuss 0Share
Chemical EquilibriumCommon-Ion Effect and H₂S Equilibrium39Choose the best answerFor H₂S ⇌ 2H⁺ + S²⁻, addition of NH₄OH causes the concentration of S²⁻ to:ADecreaseBRemain unchangedCIncreaseDBecome zero Like 0 Discuss 0Share
Chemical EquilibriumIonic Product and Precipitation40Choose the best answerPrecipitation occurs when the ionic product Qsp is:ALess than KspBGreater than KspCEqual to zeroDAlways equal to Ksp Like 0 Discuss 0Share