The entire quiz question bank (Double only)! This quiz pulls questions at random from the entire Double-only question-bank Loading... 1. What happens if a large amount of hydrogen is burnt?Carbon dioxide is producedIt burns with a sooty flameSqueaky popExplosionQuestion 1 of 10 Loading... 2. Is magnesium nitrate soluble?slightlynoyesQuestion 2 of 10 Loading... 3. Are neutralisation reactions exothermic or endothermic?EndothermicDepends on the reagentsDepends on the temperature of the surroundingsExothermicQuestion 3 of 10 Loading... 4. Describe how you would test for sulfate ions (SO₄²⁻) and what is the result if they are present?Add nitric acid and see if carbon dioxide bubbles formAdd dilute HCl, followed by barium chloride (BaCl₂) and see if a white precipitate formsFlame test. Flame colour is lilacAdd dilute HCl, followed by silver nitrate (AgNO₃) and see if a white precipitate formsQuestion 4 of 10 Loading... 5. What is meant by the term molecular formula?A method of calculating the mass needed to make a certain yield in an equationA method of calculating the ratios of masses in an equationA chemical formula that shows the actual numbers of the different types of atoms in a moleculeA chemical formula that shows the simplest ratio of the numbers of atoms in a compoundQuestion 5 of 10 Loading... 6. In a combustion calorimetry experiment, 0.78g of ethanol (C₂H₅OH) produced 12,540 J of heat energy. Calculate the molar enthalpy change.-369 kJ/mol (Amount = 0.78/23 = 0.034 mol. Answer = 12540/1000/0.034 = 369 kJ/mol)-738 kJ/mol (Amount = 0.78/46 = 0.017 mol. Answer = 12540/1000/0.017 = 738 kJ/mol)-213 kJ/mol (Amount = 46/0.78 = 59.0 mol. Answer = 12540/59.0 = 213 kJ/mol)-425 kJ/mol (Amount = 23/0.78 = 29.5 mol. Answer = 12540/29.5 = 425 kJ/mol)Question 6 of 10 Loading... 7. What percentage of the Earth's atomosphere is oxygen?78%18%0.04%21%Question 7 of 10 Loading... 8. How are lithium ions identified, and what is the result?Using a flame test. Flame colour is redUsing sodium hydroxide. Precipitate is greenUsing a flame test. Flame colour is greenUsing sodium hydroxide. Precipitate is blueQuestion 8 of 10 Loading... 9. What is the formula for calcium nitride?Ca₂(NO₃)Ca(NO₃)₂Ca₂N₃Ca₃N₂Question 9 of 10 Loading... 10. A sample of hydrogen chloride gas has a volume of 48 dm³. What amount of hydrogen chloride is this?2 moles48 moles1 mole24 molesQuestion 10 of 10 Loading... Related Posts:The entire quiz question bank!Key Calculations quizEquilibria (triple) quizCondensation Polymers quizElectrolysis quizAlcohols & Carboxylic Acids quiz Hydr0Gen2022-03-09T21:20:41+00:00Categories: Uncategorized|Tags: Quiz| Share This Story, Choose Your Platform! FacebookXRedditLinkedInTumblrPinterestVkEmail
