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AQA GCSE CHEMISTRY KEY WORDS VERIFIED ANSWERS

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AQA GCSE CHEMISTRY KEY WORDS VERIFIED ANSWERS 1. What type of solution has a pH level that is low due to the presence of hydrogen ions? Answer: Acid. 2. What is the energy required to start a chemical reaction? Answer: Activation energy. 3. What type of solution has a pH level that is hig...

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  • July 11, 2024
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  • 2023/2024
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AQA GCSE CHEMISTRY KEY WORDS VERIFIED ANSWERS
1. What type of solution has a pH level that is low due to the presence of hydrogen ions?



Answer: Acid.



2. What is the energy required to start a chemical reaction?



Answer: Activation energy.



3. What type of solution has a pH level that is high due to the presence of hydroxide ions?



Answer: Alkali.



4. Which metals are known for their high reactivity and are found on the left side of the periodic table?



Answer: Alkali metals.



5. What type of hydrocarbon contains only single bonds between carbon atoms?



Answer: Alkanes.



6. What type of hydrocarbon contains double bonds between carbon atoms?



Answer: Alkenes.



7. What is a mixture of atoms that results in distorted layers that cannot slide past each other?



Answer: Alloy.

, 8. Which electrode is positively charged in electrolysis?



Answer: Anode.



9. What is the mixture formed when a soluble substance is added to water?



Answer: Aqueous solution.



10. What is the smallest unit of matter, composed of protons, neutrons, and electrons?



Answer: Atom.



11. What is the number of protons present in an atom?



Answer: Atomic number.



12. What is a base that will react with an acid to form a salt as one of the products?



Answer: Base.



13. Which materials can be broken down by microorganisms into simpler substances?



Answer: Biodegradable materials.



14. What type of fuel is made from animal or plant products?



Answer: Biofuel.

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