Key Reactions quiz Loading... 1. hydrochloric acid + magnesium →hydrochloric acid + magnesium → magnesium hydrochloride + hydrogenhydrochloric acid + magnesium → magnesium chloride + waterhydrochloric acid + magnesium → magnesium chloride + hydrogenhydrochloric acid + magnesium → magnesium hydrochloride + waterQuestion 1 of 14 Loading... 2. Can a base neutralise an acid?NoOnly if it is more reactive than hydrogenYesSometimesQuestion 2 of 14 Loading... 3. What is an alkali?An alkali is a compound that reacts with metalsAn alkali is a corrosive substanceAn alkali is a source of hydroxide ions, OH⁻An alkali is a colourless solutionQuestion 3 of 14 Loading... 4. What is the formula for ammonium sulfide?NH₈SNH₄S₂(NH₄)₂SNH₄SQuestion 4 of 14 Loading... 5. A gas is bubbled through limewater and the limewater goes cloudy. Identify the gas.HydrogenCarbon dioxideAmmoniaChlorineQuestion 5 of 14 Loading... 6. If copper chloride has the formula CuCl₂, what is the formula of the copper ion?Cu⁻Cu²⁺Cu²⁻Cu⁺Question 6 of 14 Loading... 7. What is an alkali compared to a base?Alkalis have higher pHs than basesAlkalis are anything with a pH above 7. Bases are only metal oxidesAlkalis are bases that are soluble in waterBoth alkalis and bases have pH greater than 7 but only alkalis are corrosiveQuestion 7 of 14 Loading... 8. Balance the following equation: WO₃ + H₂ → W + H₂O 2WO₃ + 3H₂ → 2W + 6H₂O WO₃ + 3H₂ → W + 6H₂O WO₃ + 6H₂ → W + 3H₂O WO₃ + 3H₂ → W + 3H₂OQuestion 8 of 14 Loading... 9. 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 more metal leaves the metal oxide, releasing carbon dioxideReacting with acid releases carbon dioxideQuestion 9 of 14 Loading... 10. When carbon burns in air, is the oxide acidic or basic?AcidicBasicNeutralDepends on conditionsQuestion 10 of 14 Loading... 11. What is the pH of a weak acid?12-144-60-38-10Question 11 of 14 Loading... 12. State the colour of litmus in acidic and alkaline solutionsacidic = red alkali = blueacidic = pink alkali = colourless acidic = blue alkali = red acidic = colourless alkali = pinkQuestion 12 of 14 Loading... 13. What is the universal indicator colour of a strongly alkali solution?PurpleBlueGreenRedQuestion 13 of 14 Loading... 14. If an element conducts electricity, is it typically a metal or a non-metal?Non-metalMetalEitherDepends on conditionsQuestion 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