Key Reactions quiz Loading... 1. State the colour of methyl orange in acidic and alkaline solutionsacidic = yellow alkali = redacidic = orange alkali = yellowacidic = red alkali = yellowacidic = red alkali = orangeQuestion 1 of 14 Loading... 2. What is the formula for magnesium iodide?Mg₂I₂MgIMgI₂Mg₂IQuestion 2 of 14 Loading... 3. If an element conducts electricity, is it typically a metal or a non-metal?EitherNon-metalDepends on conditionsMetalQuestion 3 of 14 Loading... 4. Write the word and chemical equation for the thermal decompostion of calcium carbonate, CaCO₃calcium carbonate → calcium oxide + carbon dioxide CaCO₃ → CaO + CO₂calcium carbonate → calcium + carbon monoxide 2CaCO₃ → 2Ca + 3COcalcium carbonate → calcium + carbon dioxide 2CaCO₃ → Ca + 2CO₂calcium carbonate → calcium dioxide + carbon monoxide CaCO₃ → CaO₂ + COQuestion 4 of 14 Loading... 5. Is iron (III) hydroxide acidic or basic?Neutral (as metal hydroxides are neutral)Acidic (as metal hydroxides are acidic)Depends on the conditionsBasic (as metal hydroxides are basic)Question 5 of 14 Loading... 6. Give the formula of sulfuric acidH₂SO₄HSO₄HSH₂SQuestion 6 of 14 Loading... 7. A gas is bubbled through limewater and the limewater goes cloudy. Identify the gas.Carbon dioxideChlorineAmmoniaHydrogenQuestion 7 of 14 Loading... 8. What observations are made when magnesium burns in air?Bright white light. White solid left behind.Bright orange flame. Black solid left behindBright white light. Black solid left behindBright orange flame. White solid left behindQuestion 8 of 14 Loading... 9. What is an alkali?An alkali is a corrosive substanceAn alkali is a colourless solutionAn alkali is a source of hydroxide ions, OH⁻An alkali is a compound that reacts with metalsQuestion 9 of 14 Loading... 10. If copper chloride has the formula CuCl₂, what is the formula of the copper ion?Cu⁻Cu²⁺Cu²⁻Cu⁺Question 10 of 14 Loading... 11. What is the universal indicator colour of a pH 0-3 solution?GreenRedYellowPurpleQuestion 11 of 14 Loading... 12. Balance the equation for the reaction: ___ HCl(aq) + ___ MnO₂(s) → ___MnCl₂(aq) + ___H₂O(l) + ___ 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)2 HCl(aq) + MnO₂(s) → MnCl₂(aq) + H₂O(l) + Cl₂(g)6 HCl(aq) + MnO₂(s) → MnCl₂(aq) + 2H₂O(l) + 2 Cl₂(g)Question 12 of 14 Loading... 13. What is a base?A source of hydroxide ions, OH⁻A substance which can neutralise an acid, forming salt and water onlyAn unreactive form of an alkali that is used to store itA compound that reacts with an acid to form hydrogenQuestion 13 of 14 Loading... 14. With universal indicator, what is the pH of a green solution?12-140-38-107 (neutral)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! FacebookTwitterRedditLinkedInTumblrPinterestVkEmail
