This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry Basics > Chemistry – Quiz 24 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 24 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. 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. 3. 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. 4. 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. 5. ..... 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. 6. Sodium fluoride has a high melting and boiling point because ..... A) Strong van der waals forces between molecules. B) Weak van der waals forces between molecule. C) The ions are held by strong electrostatic forces. D) Hydrogen bond exist in the molcules. Show Answer Correct Answer: C) The ions are held by strong electrostatic forces. 7. Phase change from a gas to a liquid. A) Condensation. B) Evaporation. C) Melting. D) Deposition. Show Answer Correct Answer: A) Condensation. 8. Mercury is a metal that is liquid at room temperature and has a density of 13.5 g/cm3. Which of these metals would sink below the mercury if dropped into a container of mercury? A) Gold (density=19.3 g/cm3). B) Lead (density=11.4 g/cm3). C) Iron (density=7.9g/cm3). D) Aluminum (density=2.7g/cm3). Show Answer Correct Answer: A) Gold (density=19.3 g/cm3). 9. The study of the properties and changes in matter and their relation to energy. A) Physical Chemistry. B) Biochemistry. C) Organic Chemistry. D) Inorganic Chemistry. Show Answer Correct Answer: A) Physical Chemistry. 10. Chemistry is the study of the ..... and behaviors of ..... A) Size, mass. B) Energy, matter. C) Properties, matter. D) Characteristics, life. Show Answer Correct Answer: C) Properties, matter. 11. What is the correct formula for Ammonium phosphate? A) NH4PO4. B) NH43PO4. C) (NH4)3PO4. D) NH4(PO4)3. Show Answer Correct Answer: C) (NH4)3PO4. 12. What reaction is used to make soaps? A) Condensation. B) Hydrolysis. C) Esterification. D) None of above. Show Answer Correct Answer: B) Hydrolysis. 13. Which type of reaction occurs when 2-iodo-2-methylpropane, C(CH3)3I, reacts with aqueous sodium hydroxide, NaOH(aq)? A) Addition. B) Free-radical substitution. C) SN1. D) SN2. Show Answer Correct Answer: C) SN1. 14. In ionic bonds, electrons are A) Gained or lost. B) Shared. C) Mixed randomly. D) Negatively charged. Show Answer Correct Answer: A) Gained or lost. 15. Which property is similar for chlorine, bromine, iodine and astatine in Group 17 of the Periodic Table? I Reacts with water to form an acidic solution.II Reacts with sodium hydroxide solution to form two salts.III Exist as solid at room temperature.IV All are good bleaching agents. A) I and II. B) I and III. C) II and IV. D) III and IV. Show Answer Correct Answer: A) I and II. 16. How many atoms of magnesium are present in 96u of Magnesium A) 0.25. B) 25. C) 4. D) 0.4. Show Answer Correct Answer: C) 4. 17. What is the name of the compound P3O5? A) Triphosphorus pentaoxide. B) Phosphorus pentaoxide. C) Triphosphorus oxide. D) Phosphorus oxide. Show Answer Correct Answer: A) Triphosphorus pentaoxide. 18. A group of elements in the periodic table is also called a ..... A) Family. B) Element. C) Period. D) Row. Show Answer Correct Answer: A) Family. 19. G of solid potassium chloride, KCl needs to be dissolved in distilled water to produce 0.4 mol dm-3 potassium chloride solution, KCl. What is the volume of distilled water needed to dissolve the solid potassium chloride? [Molar mass of KCL = 74.5 g mol-1] A) 50 cm3. B) 200 cm3. C) 500 cm3. D) 2 000 cm3. Show Answer Correct Answer: C) 500 cm3. 20. What is a solvent A) A liquid that will dissolve a solid solute. B) Another word for solubility. C) A substance that make drinks change color. D) The solid that is about to be dissolved. Show Answer Correct Answer: A) A liquid that will dissolve a solid solute. ← PreviousNext →Related QuizzesChemistry QuizzesScience QuizzesChemistry Quiz 1Chemistry Quiz 2Chemistry Quiz 3Chemistry Quiz 4Chemistry Quiz 5Chemistry Quiz 6Chemistry Quiz 7Chemistry Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books