This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 30 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 30 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following symbols represents a compound? A) Co. B) Br. C) Fe. D) CO. Show Answer Correct Answer: D) CO. 2. What are the two main categories of elements onthe periodic table? A) Alloys or metals. B) Metals and nonmetals. C) Solutions and compounds. D) Pure substances and mixtures. Show Answer Correct Answer: B) Metals and nonmetals. 3. Why are HDLS (High-Density Lipoproteins) considered the "heroes" ? A) They transport excess cholesterol back to liver. B) They transport excess cholesterol to arteries. C) They are processed through the body very quickly. D) They are found in every fatty food. Show Answer Correct Answer: A) They transport excess cholesterol back to liver. 4. Solution where more solute can still be dissolved at the given temperature. A) Saturated. B) Unsaturated. C) Supersaturated. D) Homogeneous solution. Show Answer Correct Answer: B) Unsaturated. 5. What is unique about carbon? A) Bonding properties. B) Ability to bond with oxygen. C) Properties as a reactant. D) Properties as an enzyme. Show Answer Correct Answer: A) Bonding properties. 6. Whenobserving a salad with lettuce, carrots, radishes, and cucumbers, a studentcorrectly classified it as which of the following? A) An element. B) A compound. C) A homogeneous mixture. D) A heterogeneous mixture. Show Answer Correct Answer: D) A heterogeneous mixture. 7. The smallest building block of all matter in the universe. A) Atom. B) Matter. C) Proton. D) Element. Show Answer Correct Answer: A) Atom. 8. Which correctly lists elements? A) S2Fe, Al, Sr, O. B) C, Fe, Al, Sr. C) H2o, C, Al, S. D) C, fe, al, sr. Show Answer Correct Answer: B) C, Fe, Al, Sr. 9. Measure of the space occupied by an object. A) Volume. B) Mass. C) Matter. D) Solid. Show Answer Correct Answer: A) Volume. 10. What is the correct chemical formula for strontium acetate? A) SrC2H3O2. B) Sr2C2H3O2. C) Sr(C2H3O2)2. D) Sr(C2H3O2)3. Show Answer Correct Answer: C) Sr(C2H3O2)2. 11. Which state of matter has a fixed shape and volume and it's molecules move very slowly? A) Liquid. B) Gas. C) Solid. D) Plasma. Show Answer Correct Answer: C) Solid. 12. Group of elements whose ending e-configuration is p5. 7 electrons in outer level, easily gain electrons. A) Noble gases. B) Halogens. C) Chalcogens. D) Nitrogen Group. Show Answer Correct Answer: B) Halogens. 13. The $ atomic\ no.$ of an element is $ 19$ and its $ mass\ no.$ is $ 39$ . What is the no. of $ neutrons$? A) 19. B) 39. C) 58. D) 20. Show Answer Correct Answer: D) 20. 14. According to periodic trends, which element would have more valence electrons than oxygen? A) Carbon (C). B) Chlorine (Cl). C) Selenium (Se). D) Phosphorus (P). Show Answer Correct Answer: B) Chlorine (Cl). 15. Elements are found in the ..... A) Lithosphere, biosphere, hydrosphere, and the atmosphere. B) Lithosphere, elmentsphere, and the universe. C) Atmosphere, universe, and lithosphere. D) Periodic table of elements. Show Answer Correct Answer: A) Lithosphere, biosphere, hydrosphere, and the atmosphere. 16. What are Chemical Changes? A) Characteristics that can be observed/measured without changing the identity of the substance. B) Changes that do not affect the identity of the substance. C) A property that depends on the amount of matter in a sample. D) When one or more substances are converted into different substances. Show Answer Correct Answer: D) When one or more substances are converted into different substances. 17. A ..... can be used to help visualize microscopic structures and events. A) Variable. B) Hypothesis. C) Theory. D) Model. Show Answer Correct Answer: D) Model. 18. Can solid nitrogen conduct electricity? A) No, it exist as neutral molecule. B) No, it is covalent compound. C) Yes, it consists of ions. D) Yes, it is ionic compound. Show Answer Correct Answer: A) No, it exist as neutral molecule. 19. The use of mathematics and computers to understand the principles behind observed chemical behavior and to design and predict the properties of new compounds. A) Theoretical Chemistry. B) Biochemistry. C) Inorganic Chemistry. D) Organic Chemistry. Show Answer Correct Answer: A) Theoretical Chemistry. 20. Metals are malleable, this means they are ..... A) Shiny. B) Good conductors of heat and electricity. C) Can be hammered into sheets. D) Dull. Show Answer Correct Answer: C) Can be hammered into sheets. ← 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