This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 22 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 22 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Examples of these biomolecules are DNA and RNA ..... A) Nucleic Acids. B) Carbohydrates. C) Lipids. D) Proteins. Show Answer Correct Answer: A) Nucleic Acids. 2. What is the chemical formula of an alkene that has 3 carbon atoms? A) C3H2. B) C3H4. C) C3H6. D) C3H8. Show Answer Correct Answer: C) C3H6. 3. Negatively charged subatomic particles. A) Protons. B) Quarks. C) Neutrons. D) Electrons. Show Answer Correct Answer: D) Electrons. 4. Which scientist is credited with discovering the negatively charge subatomic particles in the atom? A) Neils Bohr. B) J.J. Thompson. C) Ernest Rutherford. D) Dalton. Show Answer Correct Answer: B) J.J. Thompson. 5. Table Sugar (C12H22O11) has how many atoms of hydrogen? A) 12. B) 22. C) 11. D) 45. Show Answer Correct Answer: B) 22. 6. Which of the following is a characteristic of Atomic Packing Factor? A) Fraction of volume in a crystal that is occupied by constituent particles. B) Is dimentionless and always less than unity. C) Determined by assuming that atoms are rigid spheres. D) Everything in the list. Show Answer Correct Answer: D) Everything in the list. 7. Which of the following properties is a physical property? A) Flammability. B) Boiling point. C) Corrosive. D) Reacts with metals. Show Answer Correct Answer: B) Boiling point. 8. Is NaCl an element or compound? A) Element. B) Compound. C) Both. D) None of above. Show Answer Correct Answer: B) Compound. 9. A Mixture is defined as A) A combination of two or more substances that are not chemically combined. B) A combination of compounds that are chemically bonded. C) 2 or more elements chemically bonded. D) None of above. Show Answer Correct Answer: A) A combination of two or more substances that are not chemically combined. 10. How many significant figures are present in 0.0025 A) Two. B) Three. C) Four. D) Five. Show Answer Correct Answer: A) Two. 11. Which of the following would you use to separate mixtures based on their rate of passing through a medium with a solvent present? A) Distillation. B) Chromatography. C) Filtration. D) None of above. Show Answer Correct Answer: B) Chromatography. 12. The state of matter that has no definite size or shape is A) Solid. B) Liquid. C) Gas. D) None of above. Show Answer Correct Answer: C) Gas. 13. Sulphur shows valencies A) 2. B) 4. C) Both. D) None of above. Show Answer Correct Answer: C) Both. 14. Mass percent of phosphorus in calcium phosphate is A) 38.71%. B) 20%. C) 41.29%. D) 28%. Show Answer Correct Answer: B) 20%. 15. Which determines the mass of an element? A) Protons. B) Neutrons. C) Electrons. D) Only Protons and Neutrons. Show Answer Correct Answer: D) Only Protons and Neutrons. 16. Place the following number in scientific notation:0.0000000349600 A) 3.50 x108. B) 35.0 x10-8. C) 3.49 x108. D) 3.50 x10-8. Show Answer Correct Answer: D) 3.50 x10-8. 17. An atom has 29 protons, 29 electrons, and 35 neutrons. What is the mass number of the atom? A) 29. B) 35. C) 64. D) 93. Show Answer Correct Answer: C) 64. 18. Al razi was a great physcian, scientist and chemist. He discovered many things. One of them was A) Anaesthesia. B) Carbon. C) Water. D) Nothing. Show Answer Correct Answer: A) Anaesthesia. 19. Suppose that you experimentally determine the mass of nylon formed as a result of each of several similar chemical processes. What are the measurements of mass called? A) Qualitative data. B) Independent variables. C) Controls. D) Quantitative data. Show Answer Correct Answer: D) Quantitative data. 20. ..... is the branch of chemistry that would study and develop new materials to improve existing products or make new ones that in general do no contain carbon. A) Organic Chemistry. B) Inorganic Chemistry. C) Biochemistry. D) Physical Chemistry. Show Answer Correct Answer: B) Inorganic Chemistry. ← 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