This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 23 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 23 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. Phase change from a gas to a liquid. A) Condensation. B) Evaporation. C) Melting. D) Deposition. Show Answer Correct Answer: A) Condensation. 3. 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). 4. 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. 5. 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. 6. 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. 7. What reaction is used to make soaps? A) Condensation. B) Hydrolysis. C) Esterification. D) None of above. Show Answer Correct Answer: B) Hydrolysis. 8. 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. 9. 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. 10. 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. 11. 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. 12. 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. 13. 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. 14. 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. 15. 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. 16. ..... are made up of solutes and solvents. A) Solutions. B) Suspension. C) Colloid. D) None of above. Show Answer Correct Answer: A) Solutions. 17. What term describes a liquid changing to a gas? A) Deposition. B) Sublimation. C) Freezing. D) Evaporation. Show Answer Correct Answer: D) Evaporation. 18. In this equation 2NaF + Br2 $\rightarrow$2NaBr +F2The underline part is a ..... A) Product. B) Reactant. C) Element. D) None of above. Show Answer Correct Answer: A) Product. 19. Which of the following substances are structural isomers of each other? I. CH3(CH2)3CH3II. (CH3)2CHCH3III. CH3CH(CH3)CH2CH3 A) I and II only. B) I and III only. C) II and III only. D) I, II and III. Show Answer Correct Answer: B) I and III only. 20. Which statement about oils is correct A) Oils are solid at >5C. B) Oils are mainly animal food based. C) Most oils contain unsaturated fats. D) Oils are less healthy than fats. Show Answer Correct Answer: C) Most oils contain unsaturated fats. ← 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