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College Bowl Points \( \qquad \) Extra Credit article points \( \qquad \) Chapter 2 Test "Chemistry Comes Alive" MULTIPLE CHOICE. Choose the one choice that best completes the statement or answers the question. \( \qquad \) 1. The speed or rate of a chemical reaction is influenced by all of the following except \( \qquad \) ? a) the concentration of the reactants b)the temperature c)the presence or absence of carbon d) the presence of catalysts or enzymes \( \qquad \) 2. \( \mathrm{CH}_{4} \) means \( \qquad \) A) there is one carbon and four hydrogens b) this is an inorganic molecules c) there are 4 carbons and 4 hydrogens d)this was involved in redox reaction \( \qquad \) 3.The numbers listed represent the first,second, and third energy levels respectively. On tis basis Which of the following is an unstable or reactive atom ? a) 2,8 b) \( 2,8,1 \) c) \( 2,8,8 \) d) 2 \( \qquad \) 4. A solution that has a pH of 2 could best be described as being \( \qquad \) . a) Acidic b) slightly acidic c) neutral d) basic \( \qquad \) 5 Which of the following would be regarded as an organic molecule? a) \( \mathrm{H}_{2} \mathrm{O} \quad \) b) \( \mathrm{CH}_{4} \) c) NaOH d) NaCl \( \qquad \) 6 A chain of 25 amino acids would be called a \( \qquad \) a) Protein b) polypeptide c) nucleotide d) starch \( \qquad \) 7 A long chain of simple sugars would be a \( \qquad \) . a) Polysaccharide b) monosaccharide c) protein d)Nucleic acid \( \qquad \) 8 Carbohydrates and proteins are built up from their basic building blocks by the \( \qquad \) a) Removal of a water between each two units b) addition of a carbon between each two units c) removal of a nitrogen atom between each two units d) addition of a water molecule between each two units

Ask by Willis Cummings. in the United States
Feb 27,2025

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1. c) the presence or absence of carbon 2. A) there is one carbon and four hydrogens 3. b) 2,8,1 4. a) Acidic 5. b) \( \mathrm{CH}_{4} \) 6. b) Polypeptide 7. a) Polysaccharide 8. a) Removal of a water between each two units

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Did you know that the concept of acids and bases dates back to the ancient Greeks? The term “acid” comes from the Latin word "acidus," meaning sour, as many acids have a tangy taste! These early thinkers laid the groundwork for chemistry, with Aristotle even proposing that everything was made up of four elements: earth, water, air, and fire. It wasn't until the 18th century that scientists like Antoine Lavoisier and Svante Arrhenius began to define acids and bases more rigorously, leading to the science we know today. If you're looking to apply your chemistry knowledge in a fun way, consider trying your hand at making DIY volcanoes! By combining baking soda (a base) with vinegar (an acid), you can create an impressive reaction that resembles an erupting volcano. This not only demonstrates an acid-base reaction but also makes for an entertaining science project. Just remember to wear safety goggles and have fun exploring those bubbling chemical reactions!

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