Key Reactions quiz Loading... 1. 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 dioxide 2CaCO₃ → Ca + 2CO₂calcium carbonate → calcium + carbon monoxide 2CaCO₃ → 2Ca + 3COcalcium carbonate → calcium dioxide + carbon monoxide CaCO₃ → CaO₂ + COQuestion 1 of 14 Loading... 2. What is the universal indicator colour of a weakly alkali solution?RedGreenBlueYellowQuestion 2 of 14 Loading... 3. What is an acid?An acid is a compound that reacts with metalsAn acid is a source of hydrogen ions, H⁺An acid is a green solutionAn acid is a corrosive substanceQuestion 3 of 14 Loading... 4. What is the formula for silver carbonate?Ag₃(CO₃)₂Ag(CO₃)₂Ag₂(CO₃)₃Ag₂CO₃Question 4 of 14 Loading... 5. Describe the test for hydrogen gasUse a lit splint to see if the gas popsRelights a glowing splintTurns damp red litmus paper blueTurns moist litmus paper white (bleaches)Question 5 of 14 Loading... 6. State the formula for the iron (II) ionFe²⁺Fe⁻Fe⁺Fe²⁻Question 6 of 14 Loading... 7. If an element conducts electricity, is it typically a metal or a non-metal?EitherNon-metalDepends on conditionsMetalQuestion 7 of 14 Loading... 8. acid + base →acid + base → salt + hydrogenacid + base → salt + wateracid + base → salt + hydrogen + oxygenacid + base → salt + water + carbon dioxideQuestion 8 of 14 Loading... 9. What is the pH of a neutral solution?711014Question 9 of 14 Loading... 10. When sulfur burns in air, is the oxide acidic or basic?NeutralDepends on conditionsBasicAcidicQuestion 10 of 14 Loading... 11. State the colour of phenolphthalein in acidic and alkaline solutionsacidic = red alkali = blueacidic = blue alkali = red acidic = pink alkali = colourless acidic = colourless alkali = pinkQuestion 11 of 14 Loading... 12. Can a base neutralise an acid?YesNoOnly if it is more reactive than hydrogenSometimesQuestion 12 of 14 Loading... 13. Is magnesium oxide acidic or basic?Depends on the conditionsNeutral AcidicBasicQuestion 13 of 14 Loading... 14. 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 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