Key Reactions quiz Loading... 1. What is the universal indicator colour of a pH 0-3 solution?YellowGreenRedPurpleQuestion 1 of 14 Loading... 2. State the colour of phenolphthalein in acidic and alkaline solutionsacidic = red alkali = blueacidic = pink alkali = colourless acidic = colourless alkali = pinkacidic = blue alkali = red Question 2 of 14 Loading... 3. What is a base?A substance which can neutralise an acid, forming salt and water onlyA source of hydroxide ions, OH⁻A compound that reacts with an acid to form hydrogenAn unreactive form of an alkali that is used to store itQuestion 3 of 14 Loading... 4. With universal indicator, what is the pH of a purple solution?11-140-34-78-10Question 4 of 14 Loading... 5. Balance the equation for the reaction: ___ HCl(aq) + ___ MnO₂(s) → ___MnCl₂(aq) + ___H₂O(l) + ___ Cl₂(g)2 HCl(aq) + MnO₂(s) → MnCl₂(aq) + H₂O(l) + Cl₂(g)6 HCl(aq) + MnO₂(s) → MnCl₂(aq) + 2H₂O(l) + 2 Cl₂(g)4 HCl(aq) + MnO₂(s) → MnCl₂(aq) + 2H₂O(l) + Cl₂(g)4 HCl(aq) + 2 MnO₂(s) → 2 MnCl₂(aq) + 2H₂O(l) + Cl₂(g)Question 5 of 14 Loading... 6. If iron oxide has the formula FeO, what is the formula of the iron ion?Fe²⁺Fe⁺Fe²⁻Fe⁻Question 6 of 14 Loading... 7. How can metal carbonates be used to produce carbon dioxide?Reacting with acid releases carbon dioxideThemal Decomposition: when metal carbonates are heated, they break down releasing carbon dioxide. Alternatively, the carbonate can be added to an acid.Reacting with more metal leaves the metal oxide, releasing carbon dioxideBurning them in air releases carbon dioxideQuestion 7 of 14 Loading... 8. hydrochloric acid + magnesium →hydrochloric acid + magnesium → magnesium hydrochloride + waterhydrochloric acid + magnesium → magnesium hydrochloride + hydrogenhydrochloric acid + magnesium → magnesium chloride + waterhydrochloric acid + magnesium → magnesium chloride + hydrogenQuestion 8 of 14 Loading... 9. Which are described as acidic: metal oxides or non-metal oxides?Neithernon-metal oxidesMetal oxidesDepends on conditionsQuestion 9 of 14 Loading... 10. Describe the test for carbon dioxide gasTurns damp red litmus paper blueRelights a glowing splintTurns moist litmus paper white (bleaches)Bubble the gas through limewater and see if it goes cloudyQuestion 10 of 14 Loading... 11. Is magnesium oxide acidic or basic?Depends on the conditionsAcidicBasicNeutral Question 11 of 14 Loading... 12. When carbon burns in air, is the oxide acidic or basic?AcidicNeutralDepends on conditionsBasicQuestion 12 of 14 Loading... 13. What is an alkali?An alkali is a colourless solutionAn alkali is a source of hydroxide ions, OH⁻An alkali is a compound that reacts with metalsAn alkali is a corrosive substanceQuestion 13 of 14 Loading... 14. What is the formula for sodium oxide?NaO₂NaONaO₃Na₂OQuestion 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
