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

Let's go through each question step by step and identify the correct answers based on the principles of chemistry. ### Question 1 **The speed or rate of a chemical reaction is influenced by all of the following except:** - a) the concentration of the reactants - b) the temperature - c) the presence or absence of carbon - d) the presence of catalysts or enzymes **Explanation:** The rate of a chemical reaction is influenced by the concentration of reactants, temperature, and the presence of catalysts or enzymes. The presence or absence of carbon is not a direct factor affecting the rate of a reaction. **Answer:** c) the presence or absence of carbon --- ### Question 2 **\( \mathrm{CH}_{4} \) means:** - A) there is one carbon and four hydrogens - b) this is an inorganic molecule - c) there are 4 carbons and 4 hydrogens - d) this was involved in a redox reaction **Explanation:** The chemical formula \( \mathrm{CH}_{4} \) indicates that there is one carbon atom and four hydrogen atoms. **Answer:** A) there is one carbon and four hydrogens --- ### Question 3 **The numbers listed represent the first, second, and third energy levels respectively. On this basis, which of the following is an unstable or reactive atom?** - a) 2,8 - b) 2,8,1 - c) 2,8,8 - d) 2 **Explanation:** An atom is considered unstable or reactive if it does not have a full outer shell of electrons. The configuration 2,8,1 indicates that the outermost shell has only one electron, making it reactive. **Answer:** b) 2,8,1 --- ### Question 4 **A solution that has a pH of 2 could best be described as being:** - a) Acidic - b) slightly acidic - c) neutral - d) basic **Explanation:** A pH of 2 indicates a high concentration of hydrogen ions, which means the solution is strongly acidic. **Answer:** a) Acidic --- ### Question 5 **Which of the following would be regarded as an organic molecule?** - a) \( \mathrm{H}_{2} \mathrm{O} \) - b) \( \mathrm{CH}_{4} \) - c) NaOH - d) NaCl **Explanation:** Organic molecules are typically defined as containing carbon and hydrogen. \( \mathrm{CH}_{4} \) (methane) is an organic molecule. **Answer:** b) \( \mathrm{CH}_{4} \) --- ### Question 6 **A chain of 25 amino acids would be called a:** - a) Protein - b) Polypeptide - c) Nucleotide - d) Starch **Explanation:** A chain of amino acids is referred to as a polypeptide. When it folds into a specific structure and functions, it is called a protein. **Answer:** b) Polypeptide --- ### Question 7 **A long chain of simple sugars would be a:** - a) Polysaccharide - b) Monosaccharide - c) Protein - d) Nucleic acid **Explanation:** A long chain of simple sugars (monosaccharides) is known as a polysaccharide. **Answer:** a) Polysaccharide --- ### Question 8 **Carbohydrates and proteins are built up from their basic building blocks by the:** - 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 **Explanation:** Carbohydrates and proteins are formed through dehydration synthesis, which involves the removal of a water molecule between each two units. **Answer:** a) Removal of a water between each two units --- These answers should help you complete your quiz on chemistry effectively!