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Question 1 of 6
1. Question
1 point(s)2 experiments are carried out to study the rate of reaction between calcium carbonate and nitric acid to produce carbon dioxide gas. The quantity of reactant used are as follow:
Experiment 1: Excess calcium carbonate and 25 cm³ of 1 mol/dm³ nitric acid
Experiment 2: Excess calcium carbonate and 50 cm³ of 0.5 mol/dm³ nitric acidWhich of the following graphs represents the 2 experiments
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Question 2 of 6
2. Question
1 point(s)2H2O2 → 2H2O + O2
The equation above show the decomposition of hydrogen peroxide. The rate of this reaction decreases over time because
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Question 3 of 6
3. Question
1 point(s)The equation below shows a reaction to produce hydrogen gas.
3H2SO4 + 2Al → Al2(SO4)3 + 3H2
Which of the following will increase the rate of the reaction?
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Question 4 of 6
4. Question
1 point(s)Hydrogen peroxide solution is decomposed by using manganese (IV) oxide as catalyst. Three experiments were carried out using a fixed amount of manganese (IV) oxide. The results are shown in the graph. The solutions used were :
(a) 25 cm³ of 2.0 mol/dm³ hydrogen peroxide;
(b) 50 cm³ of 1.0 mol/dm³ hydrogen peroxide;
(c) 50 cm³ of 2.0 mol/dm³ hydrogen peroxide;Which curve did each solution pro-duce?
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Question 5 of 6
5. Question
1 point(s)
The figure shows the energy profile diagram for the decomposition reaction of Potassium chlorate(V). Which of the following is true about curve P and Q?
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Question 6 of 6
6. Question
1 point(s)Which of the following are the characteristics of a catalyst?
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