Chemistry Test
By the end of the period, please submit your scripts to the teacher's table.
[Saturday, May 24 at 00:45 AM UTC] Erratum in Chemistry Test: The 12th question was changed.
Section A: Short Answer Questions
Fill in your answers on the answer sheet. Warning: numerical answers will score no marks!
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1. How many atoms of Hydrogen are there in one molecule of Paracetamol?
2. What is the pH of water?
3. A first order reaction is 75% complete after 2 minutes. After how many minutes, rounded down to the nearest integer, will this reaction be 99.61% complete?
4. What is the boiling point of Ethyl Acetate in degrees Celsius, rounded down to the nearest integer?
5. Fill in the blank: 14H2 + ___O2 = 14H2O
6. What is the atomic mass of chromium in g/mol, rounded up to the nearest integer?
7. What is the molecular mass of C3H3 in g/mol, rounded down to the nearest integer?
8. How many atoms of Carbon are there in one molecule of Tioxolone?
9. What is the atomic number of Titanium?
10. What is the melting point of Rubidium in degrees Celsius, rounded down to the nearest integer?
11. The rate constant of a first order reaction is 0.001155s-1. What is the reaction half-life in minutes, rounded down to the nearest integer?
12. How many atoms in total are there in one molecule of ethane?
13. What is the pH of a solution containing OH- ions at a concentration of 10-4 mol/l?
Section B: Multiple Response Questions
For each option that is correct, shade the corresponding cell on the answer sheet. There may be multiple correct options per question.
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14. Which of the following can be produced through a reaction between a carboxylic acid and an alcohol?
A. Benzene
B. Ester
C. Sulfur
15. A flame test is carried out. Which of the following could produce a blue flame?
A. Arsenic
B. Boron
C. Tantalum
16. Which of the following types of bonds are present in a molecule of Chloroform?
A. Ionic
B. Covalent
C. Metallic
17. Which of the following are metalloids?
A. Neon
B. Silicon
C. Uranium
18. Which of the following are not elements?
A. Bronze
B. Silver
C. Gold
19. At which of the following pH levels is Phenolphthalein colourless?
A. 2
B. 5
C. 8
This puzzle has intermediate cluephrase confirmation.
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