Key Reactions quiz Loading... 1. What is the universal indicator colour of a weakly alkali solution?BlueRedYellowGreenQuestion 1 of 14 Loading... 2. Is iron (III) hydroxide acidic or basic?Basic (as metal hydroxides are basic)Acidic (as metal hydroxides are acidic)Neutral (as metal hydroxides are neutral)Depends on the conditionsQuestion 2 of 14 Loading... 3. State the colour of phenolphthalein in acidic and alkaline solutionsacidic = pink alkali = colourless acidic = colourless alkali = pinkacidic = red alkali = blueacidic = blue alkali = red Question 3 of 14 Loading... 4. What is the formula for potassium chloride?KCl₃KCl₂KClK₂ClQuestion 4 of 14 Loading... 5. A gas is bubbled through limewater and the limewater goes cloudy. Identify the gas.AmmoniaCarbon dioxideHydrogenChlorineQuestion 5 of 14 Loading... 6. Are non-metal oxides acidic or basic?BasicDepends on conditionsAcidicNeutralQuestion 6 of 14 Loading... 7. acid + metal carbonate →acid + metal carbonate → salt + carbon dioxide acid + metal carbonate → salt + hydrogen + carbon dioxideacid + metal carbonate → salt + carbon dioxide + wateracid + metal carbonate → salt + waterQuestion 7 of 14 Loading... 8. What is an alkali?An alkali is a corrosive substanceAn alkali is a source of hydroxide ions, OH⁻An alkali is a compound that reacts with metalsAn alkali is a colourless solutionQuestion 8 of 14 Loading... 9. Can a base neutralise an acid?NoYesOnly if it is more reactive than hydrogenSometimesQuestion 9 of 14 Loading... 10. Balance the equation for the reaction: ___ HCl(aq) + ___ MnO₂(s) → ___MnCl₂(aq) + ___H₂O(l) + ___ Cl₂(g)4 HCl(aq) + 2 MnO₂(s) → 2 MnCl₂(aq) + 2H₂O(l) + Cl₂(g)6 HCl(aq) + MnO₂(s) → MnCl₂(aq) + 2H₂O(l) + 2 Cl₂(g)2 HCl(aq) + MnO₂(s) → MnCl₂(aq) + H₂O(l) + Cl₂(g)4 HCl(aq) + MnO₂(s) → MnCl₂(aq) + 2H₂O(l) + Cl₂(g)Question 10 of 14 Loading... 11. What colour flames to sulfur, carbon and magnesium produce when they burn in air?Sulfur = orange, Carbon = yellow/orange, Magnesium = whiteSulfur = blue, Carbon = yellow/orange, Magnesium = whiteSulfur = blue, Carbon = yellow/orange, Magnesium = greenSulfur = orange, Carbon = yellow/orange, Magnesium = greenQuestion 11 of 14 Loading... 12. 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.Burning them in air releases carbon dioxideReacting with acid releases carbon dioxideReacting with more metal leaves the metal oxide, releasing carbon dioxideQuestion 12 of 14 Loading... 13. What is the pH of a strong acid?6-812-144-60-3Question 13 of 14 Loading... 14. If iron oxide has the formula FeO, what is the formula of the iron ion?Fe²⁺Fe⁺Fe²⁻Fe⁻Question 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