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Question 1 of 10
1. Question
1 point(s)The following thermochemical equation shows the formation of lead (II) iodide.
Pb²⁺ + 2I- → PbI₂ ∆H = -y kJ/mol
The -y kJ/mol is called the heat of
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Question 2 of 10
2. Question
1 point(s)
The figure shows a burning match. By striking a match, a chemical reaction is initiated and ignites the match. Which of the following statements about the chemical reaction is correct?
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Question 3 of 10
3. Question
1 point(s)The energy change during the precipitation of calcium sulphate is shown in the equation below:
Ca²⁺ + SO₄²⁻ → CaSO₄ ∆H = -1435.5 kJ/mol
What is the energy change when 400cm³ of calcium chloride, CaCl₂, 0.5 mol/dm³ reacts with 200cm³ of ammonium sulphate , (NH₄)₂SO₄, 0.5 mol/dm³.
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Question 4 of 10
4. Question
1 point(s)The reaction between magnesium and iron(II) sulphate is represented by the following equation.
Mg + FeSO₄ → MgSO₄ + Fe ∆H = -189 kJ mol⁻¹
Which of the statements below are TRUE about the reaction?
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Question 5 of 10
5. Question
1 point(s)Below is a thermochemical equation.
2Na + 2H₂O → 2NaOH + H₂ ∆H = -x kJ/mol
What is the amount of heat released if 0.5 mol of sodium reacts with sufficient water?
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Question 6 of 10
6. Question
1 point(s)The following thermochemical equation represents the formation of ammonia gas.
2N₂ + 3H₂ → 2NH₃ ∆H = -xkJ/mol
Which of the following statements are true for the reaction?
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Question 7 of 10
7. Question
1 point(s)Which of the followings are endothermic reactions?
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Question 8 of 10
8. Question
1 point(s)Which of the following chemical reactions involving the release of heat to the surroundings?
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Question 9 of 10
9. Question
1 point(s)
Diagram above shows an experiment in which zinc oxide powder is added to dilute hydrochloric acid. Which of the following is true about this reaction?
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Question 10 of 10
10. Question
1 point(s)HCl + NaOH → NaCl + H₂O
The equation above represents the reaction between hydrochloric acid and sodium hydroxide. Given that this is an exothermic reaction. Which of the following statements are true about this reaction?- 1.
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