Chemistry
Created on 28th February 2025
Grade level: ESL/EFL C1 - Advancedth grade
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10 Questions
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Questions (10)
1. What is the pH level of pure water at 25 degrees Celsius?
7
4 choice options
2. Which of the following is a strong acid?
Hydrochloric acid (HCl)
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3. What is the primary gas produced during the process of photosynthesis?
Oxygen
4 choice options
4. Which of the following elements is a noble gas?
Helium
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5. Which of the following compounds is an example of a base?
Calcium hydroxide (Ca(OH)2)
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6. What is the main component of natural gas?
Methane
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7. In which part of the atom are protons located?
Nucleus
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8. What is the process called when a solid turns directly into a gas?
Sublimation
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9. Which type of bond involves the sharing of electron pairs between atoms?
Covalent bond
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10. What is the law that states that the volume of a gas is directly proportional to its temperature, assuming constant pressure?
Charles's Law
4 choice options