Hl Chemistry Mid-term Form (1)
Grade 9
Questions and Answers
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Choose the best answer:
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- 16.
In the graph below, the rate of reaction at point A is the ________ (slowest, fastest, zero) because the amount of reactants particles is ________ (maximum, minimum, zero).
Correct Answer
fastest,faster
maximum,maxExplanation
At point A on the graph, the rate of reaction is the fastest because the slope of the curve is steepest at this point, indicating a rapid change in the concentration of reactants. The amount of reactant particles is at its maximum at point A, as indicated by the high concentration of reactants, which allows for more frequent collisions and a higher likelihood of successful reactions. Therefore, the rate of reaction at point A is the fastest and the amount of reactant particles is at its maximum.Rate this question:
- 17.
In the graph below, the rate of reaction at point C is the ________ (slowest, fastest, zero) because the amount of reactants particles is ________ (maximum, minimum, zero).
Correct Answer
zero,0
zero,0Explanation
At point C on the graph, the rate of reaction is zero because there is no change in the amount of reactant particles. This means that there is no reaction occurring and the rate is effectively zero.Rate this question:
- 18.
What is the energy change for this reaction? ________ KJ/mol
Correct Answer
-97Explanation
The energy change for this reaction is -97 KJ/mol. This indicates that the reaction is exothermic, as the energy of the products is lower than the energy of the reactants. The negative sign indicates that the reaction releases energy.Rate this question:
- 19.
What is the bond energy of the C=O bond? ________
Correct Answer
841,+841Explanation
The bond energy of the C=O bond is 841 kJ/mol. This means that it requires 841 kJ of energy to break one mole of C=O bonds. The positive sign indicates that this is an endothermic process, meaning that energy is absorbed when the bond is broken. Therefore, the correct answer is 841,+841.Rate this question:
- 20.
________
Correct Answer
zinc ethanoate - 21.
________ + ________
Correct Answer
calcium ethanoate,water
calcium ethanoate,waterExplanation
The answer is repeating the combination of "calcium ethanoate" and "water" twice.Rate this question:
- 22.
________
Correct Answer
LiNO3,lino3 - 23.
Which one do you like?
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Correct Answer
B. BExplanation
The question asks for a personal preference, so the correct answer will vary depending on the individual. In this case, the person prefers option B.Rate this question:
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- 24.
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- 25.
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- 26.
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- 27.
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- 28.
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- 29.
Which one do you like?
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Correct Answer
B. BExplanation
The question asks for a personal preference between four options: A, B, C, and D. The correct answer is B, indicating that the person prefers option B out of the given choices.Rate this question:
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- 30.
Which one do you like?
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- 32.
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- 33.
For the salt (Y) prepared below, the solid X is ________ (soluble , insoluble) and the salt Y is ________ (soluble , insoluble).
Correct Answer
insoluble
solubleExplanation
The solid X is insoluble because it does not dissolve in the given solution. On the other hand, the salt Y is soluble because it dissolves in the given solution.Rate this question:
- 34.
State the colour of each indicator with Ammonia: 1- Universal indicator ________ 2- Methyl Orange ________
Correct Answer
blue
yellowExplanation
The universal indicator turns blue in the presence of ammonia, indicating a high pH. Methyl Orange, on the other hand, turns yellow in the presence of ammonia, indicating a lower pH.Rate this question:
- 35.
Which one do you like?
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Correct Answer
C. CExplanation
The given question asks for the preferred option among A, B, C, and D. The answer provided states that the preferred option is C.Rate this question:
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- 36.
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- 37.
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- 38.
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- 40.
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- 41.
Which one do you like?
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Correct Answer
B. BExplanation
The given question asks for a preference among options A, B, C, and D. The answer states that the preferred option is B.Rate this question:
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- 42.
Which one do you like?
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- 43.
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Mar 20, 2023Quiz Edited by
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Apr 16, 2020Quiz Created by
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