This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 17 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The chemical formula Br2 + Cl2 + 29.4 kJ $\rightarrow$ 2BrCl is a ..... A) Endothermic. B) Catalyst. C) Concentration. D) Exothermic. Show Answer Correct Answer: A) Endothermic. 2. Why is the scientific method important? A) All of the answers have the correct information. B) To give people/scientists a way to answer questions that they have about the world. C) By following the steps in order, scientists are more likely to get valid, accurate results. D) When they write a detailed procedure, it allows other scientists to be able to repeat their experiment. Show Answer Correct Answer: A) All of the answers have the correct information. 3. As soon as force is acted on the Oobleck, for instance rolling it into a ball, it becomes a ..... A) Leather. B) Liquid. C) Gas. D) Solid. Show Answer Correct Answer: D) Solid. 4. During chemical and physical changes, substances can absorb or give off ..... A) Energy. B) Light. C) Gases. D) Particles. Show Answer Correct Answer: A) Energy. 5. Two or more materials that combine chemically form a(n) ..... A) Mixture. B) Compound. C) Physical. D) None of above. Show Answer Correct Answer: B) Compound. 6. The study of the composition, structure, and properties of matter and the changes it undergoes. A) Chemistry. B) Physics. C) Biology. D) Social Science. Show Answer Correct Answer: A) Chemistry. 7. Which one of the following characteristics is not correct for all of the members of the same homologous series? A) Same general formula. B) Similar chemical properties, i.e. undergo the same reactions. C) Varying physical properties, i.e. change in a predictable way. D) Different functional group. Show Answer Correct Answer: D) Different functional group. 8. Which statement best explains why solids do not take the shape of their containers? A) Particles in a solid are not bound together in fixed positions and are able to flow freely. B) Particles in a solid are in continuous, rapid, random motion and have no definite shape or volume. C) Particles in a solid are highly compressible and have a high rate of diffusion in other substances. D) Particles in a solid have a fixed shape and volume due to strong intermolecular forces. Show Answer Correct Answer: D) Particles in a solid have a fixed shape and volume due to strong intermolecular forces. 9. The area of study that focuses on the composition of matter. A) Biochemistry. B) Analytical Chemistry. C) Physical Chemistry. D) Inorganic Chemistry. Show Answer Correct Answer: B) Analytical Chemistry. 10. Each element of the periodic table is composed of how many atoms? A) 1. B) 2. C) 3. D) None of above. Show Answer Correct Answer: A) 1. 11. A substance that contains only one type of atom is a(n) A) Compound. B) Element. C) Heterogeneous mixture. D) Homogeneous mixture. Show Answer Correct Answer: B) Element. 12. Which branch of chemistry would study an unknown material to determine its composition? A) Analytical. B) Organic. C) Inorganic. D) Physical. Show Answer Correct Answer: A) Analytical. 13. Which of these is one of the six most common elements found in the human body? A) Iron. B) Helium. C) Oxygen. D) Water. Show Answer Correct Answer: C) Oxygen. 14. Why is water NOT on the periodic table? A) It is naturally occuring. B) It is a compound, not an element. C) It exists as a solid, a liquid, and a gas. D) Its chemical formula doesn't fit. Show Answer Correct Answer: B) It is a compound, not an element. 15. A student incorrectly wrote the following electron configuration for fluorine as: 1s22s22p4How is this electron configuration for fluorine incorrect? A) It is incorrect because in the 1s orbital, there should be 1 electron instead of 2. B) It is incorrect because in the 2s orbital, there should be 3 electrons instead of 2. C) It is incorrect because in the 2p orbital, there should be 5 electrons instead of 4. D) It is incorrect because there should be an additional 3s level containing 2 electrons. Show Answer Correct Answer: C) It is incorrect because in the 2p orbital, there should be 5 electrons instead of 4. 16. The function of antioxidants is to A) Slow down the oxidation of fats in food. B) Give smooth texture. C) Thicken liquids. D) Replace the original flavours. Show Answer Correct Answer: A) Slow down the oxidation of fats in food. 17. Chemical reactions involve changes in properties and changes in ..... that you can often observe. A) Catalyst. B) Energy. C) Activation energy. D) Decomposition. E) Chemical changes. Show Answer Correct Answer: B) Energy. 18. A reaction that gives off heat to its surroundings is ..... A) Exothermic. B) Endothermic. C) Endergonic. D) None of these. Show Answer Correct Answer: A) Exothermic. 19. Which of the following formulas is correct for sodium phosphate? A) Na2PO3. B) NaPO. C) Na3(PO4)2. D) Na3PO4. Show Answer Correct Answer: D) Na3PO4. 20. The smallest part of an element is A) Proton. B) Atom. C) Compound. D) Mixture. Show Answer Correct Answer: B) Atom. ← PreviousNext →Related QuizzesScience QuizzesChemistry Quiz 1Chemistry Quiz 2Chemistry Quiz 3Chemistry Quiz 4Chemistry Quiz 5Chemistry Quiz 6Chemistry Quiz 7Chemistry Quiz 8Chemistry Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books