1. Yara is studying the role of international cooperation in solving environmental problems. She knows that the Paris Agreement is a global effort. What is the main goal of the Paris Agreement?
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2. Oliver is learning about the uses of transition metals. He knows that some transition metals are used as catalysts in industrial processes. Which of the following is often used as a catalyst?
3. Samir is learning about strategies to reduce environmental problems. He understands that reforestation is important. What is reforestation?
4. Victor is analyzing data from an experiment. He finds that the data follows a normal distribution. What does this imply about the data?
5. Bonding between atoms determines:
6. The sharing of one pair of electrons forms a:
7. Which periodic trend explains reactivity of metals?
8. Mohamed is learning about straight chain and branched chain compounds. He knows that straight chain compounds have no branches. Which of the following is a straight chain compound?
9. Julia is determining the oxidation number of an atom in a compound. She wants to find the oxidation state of sulfur in H2SO4. Given that H is +1 and O is -2, what is the oxidation state of S?
10. Which group elements are soft and highly reactive?
11. Graphite is an allotrope of:
12. David is measuring the volume of a liquid. He reads the volume at eye level to avoid parallax error. What is parallax error?
13. Yara is learning about the definition of chemistry. She reads that chemistry is also called the 'central science' because it connects physics with other natural sciences. Which of the following best supports this statement?
14. Chloe is learning about the dehydrogenation of alkenes. She knows that alkenes can be converted to alkanes by adding hydrogen. What is this reaction called?
15. Which carbohydrate is stored in animals?
16. Bilal is writing the molecular formula for glucose. He knows that the empirical formula is CH2O and the molar mass is 180 g/mol. What is the molecular formula?
17. Diana is learning about the components of food. She understands that food provides essential nutrients. Which of the following is a micronutrient?
18. Yusuf is studying ways to deal with water pollution. He knows that proper waste disposal is important. What is a proper way to dispose of household chemicals?
19. Emma is learning about strong and weak acids. She knows that strong acids completely ionize in water, while weak acids partially ionize. Which of the following is a strong acid?
20. Ibrahim is studying the effects of fertilizers on water quality. He knows that nitrates from fertilizers can enter water bodies. What is a disadvantage of nitrates in water?
21. The vertical axis of a graph usually represents:
22. Which molecule contains a triple bond?
23. Which reaction needs continuous energy supply?
24. Sam is studying thermochemical reactions. He knows that thermochemical equations include the enthalpy change. Which of the following is a thermochemical equation?
25. Uma is conducting an experiment to determine the concentration of an acid. She performs a titration. What is the role of the indicator in a titration?
26. Which field uses chemistry to make medicines?
27. Julia is studying the properties of acids. She knows that acids turn blue litmus paper red. What color does hydrochloric acid turn blue litmus paper?
28. Waleed is studying industrial uses of metals. He learns that copper is used in electrical wiring. Why is copper suitable for this purpose?
29. Which disease is NOT water-borne?
30. Nora is studying the properties of alkanes. She knows that alkanes are generally unreactive but undergo combustion and halogenation. What type of reaction is halogenation?