Key Reactions quiz Loading... 1. What is the pH of a strong alkali?4-78-100-311-14Question 1 of 14 Loading... 2. Balance the following equation: WO₃ + H₂ → W + H₂O WO₃ + 6H₂ → W + 3H₂O WO₃ + 3H₂ → W + 6H₂O WO₃ + 3H₂ → W + 3H₂O 2WO₃ + 3H₂ → 2W + 6H₂OQuestion 2 of 14 Loading... 3. What is the universal indicator colour of a pH 11-14 solution?RedGreenYellowPurpleQuestion 3 of 14 Loading... 4. When sulfur burns in air, is the oxide acidic or basic?AcidicBasicNeutralDepends on conditionsQuestion 4 of 14 Loading... 5. How can metal carbonates be used to produce carbon dioxide?Themal Decomposition: when metal carbonates are heated, they break down releasing carbon dioxide. Alternatively, the carbonate can be added to an acid.Reacting with acid releases carbon dioxideReacting with more metal leaves the metal oxide, releasing carbon dioxideBurning them in air releases carbon dioxideQuestion 5 of 14 Loading... 6. What is an alkali compared to a base?Alkalis have higher pHs than basesAlkalis are bases that are soluble in waterBoth alkalis and bases have pH greater than 7 but only alkalis are corrosiveAlkalis are anything with a pH above 7. Bases are only metal oxidesQuestion 6 of 14 Loading... 7. A gas is bubbled through limewater and the limewater goes cloudy. Identify the gas.HydrogenAmmoniaCarbon dioxideChlorineQuestion 7 of 14 Loading... 8. If an element conducts electricity, is it typically a metal or a non-metal?Depends on conditionsEitherMetalNon-metalQuestion 8 of 14 Loading... 9. State the formula for the iron (II) ionFe⁺Fe²⁻Fe⁻Fe²⁺Question 9 of 14 Loading... 10. Describe the observations of the reaction of calcium carbonate and dilute hydrochloric acidfizzing, solid disappears, solid floats, lilac flame seenfizzing and solid disappearsfizzing, solid moves around, solid melts, solid disappears and solid floatsno reactionQuestion 10 of 14 Loading... 11. Can a base neutralise an acid?Only if it is more reactive than hydrogenNoYesSometimesQuestion 11 of 14 Loading... 12. What is the formula for potassium hydroxide?KOHK₂OHK(OH)₂K(OH)₃Question 12 of 14 Loading... 13. State the colour of methyl orange in acidic and alkaline solutionsacidic = red alkali = yellowacidic = yellow alkali = redacidic = orange alkali = yellowacidic = red alkali = orangeQuestion 13 of 14 Loading... 14. What is an alkali?An alkali is a compound that reacts with metalsAn alkali is a source of hydroxide ions, OH⁻An alkali is a corrosive substanceAn alkali is a colourless solutionQuestion 14 of 14 Loading... Related Posts:The entire quiz question bank!The entire quiz question bank (Double only)!Key Calculations quizEquilibria (triple) quizCondensation Polymers quizElectrolysis quiz Hydr0Gen2020-02-16T16:28:50+00:00Categories: Uncategorized|Tags: Quiz, Topic: Key Reactions| Share This Story, Choose Your Platform! FacebookXRedditLinkedInTumblrPinterestVkEmail