Key Reactions quiz Loading... 1. What is the formula for calcium hydroxide?Ca₂H₃OCaOH₂Ca(H₃O)₂Ca(OH)₂Question 1 of 14 Loading... 2. Describe the test for carbon dioxide gasBubble the gas through limewater and see if it goes cloudyTurns moist litmus paper white (bleaches)Relights a glowing splintTurns damp red litmus paper blueQuestion 2 of 14 Loading... 3. What is a base?A 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 itA substance which can neutralise an acid, forming salt and water onlyQuestion 3 of 14 Loading... 4. State the formula of the zinc ionZn²⁻Zn²⁺Zn⁻Zn⁺Question 4 of 14 Loading... 5. State the colour of phenolphthalein in acidic and alkaline solutionsacidic = pink alkali = colourless acidic = colourless alkali = pinkacidic = red alkali = blueacidic = blue alkali = red Question 5 of 14 Loading... 6. What do each of the following state symbols represent: (s), (l), (g), (aq)(s) - solid. (l) - liquid. (g) - gas. (aq) - water(s) - solid. (l) - liquid. (g) - gas. (aq) - aqueous (in solution)(l) - solid. (g) - liquid. (s) - gas. (aq) - aqueous (in solution)(s) - solution. (l) - liquid. (g) - gas. (aq) - waterQuestion 6 of 14 Loading... 7. Are carbon dioxide and sulfur dioxide acidic or basic?Sulfur dioxide is acidic but carbon dioxide is basicCarbon dioxide is acidic but sulfur dioxide is basicBoth are acidic as carbon and sulfur are non-metalsBoth are basic as carbon and sulfur are non-metalsQuestion 7 of 14 Loading... 8. What is an acid?An acid is a compound that reacts with metalsAn acid is a green solutionAn acid is a source of hydrogen ions, H⁺An acid is a corrosive substanceQuestion 8 of 14 Loading... 9. What is an alkali compared to a base?Alkalis are bases that are soluble in waterAlkalis have higher pHs than basesBoth 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 9 of 14 Loading... 10. What is the universal indicator colour of a pH 4-6 solution?GreenPurpleYellowRedQuestion 10 of 14 Loading... 11. Write the word and chemical equation for the thermal decompostion of calcium carbonate, CaCO₃calcium carbonate → calcium oxide + carbon dioxide CaCO₃ → CaO + CO₂calcium carbonate → calcium dioxide + carbon monoxide CaCO₃ → CaO₂ + COcalcium carbonate → calcium + carbon dioxide 2CaCO₃ → Ca + 2CO₂calcium carbonate → calcium + carbon monoxide 2CaCO₃ → 2Ca + 3COQuestion 11 of 14 Loading... 12. acid + base →acid + base → salt + water + carbon dioxideacid + base → salt + hydrogenacid + base → salt + wateracid + base → salt + hydrogen + oxygenQuestion 12 of 14 Loading... 13. With universal indicator, what is the pH of a yellow solution?8-100-312-144-6Question 13 of 14 Loading... 14. If an element conducts electricity, is it typically a metal or a non-metal?MetalDepends on conditionsNon-metalEitherQuestion 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