This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 40 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 40 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Sugar has been dissolved in water. If you want to recover the sugar which process should be carried on? A) Neutralization. B) Condensation. C) Evaporation. D) Filtration. Show Answer Correct Answer: C) Evaporation. 2. An atom of potassium has atomic mass of 39 amu's and an atomic number of 19. therefore it has how many neutrons A) 19. B) 20. C) 21. D) 18. Show Answer Correct Answer: B) 20. 3. When the molecules are moving very fast, the substance is ..... A) Hot. B) Cold. C) Room Temperature. D) Wet. Show Answer Correct Answer: A) Hot. 4. A/an ..... is made up of one or more of the same kinds of atom chemically combined. A) Atom. B) Element. C) Molecule. D) Compound. Show Answer Correct Answer: C) Molecule. 5. The molecule which has the highest percentage of ionic character among the following is A) HF. B) HI. C) HBr. D) HCI. Show Answer Correct Answer: A) HF. 6. Three of the following must contain two more kinds of atoms. Which one does not contain two or more kinds of atoms? A) Element. B) Compound. C) Homogeneous mixture. D) Heterogenous mixture. Show Answer Correct Answer: A) Element. 7. Atoms of the same element, having different mass numbers but the same atomic number is referred to as ..... A) Particles. B) Molecules. C) Isotopes. D) Ions. Show Answer Correct Answer: C) Isotopes. 8. What is an atomic number? A) The number of electrons in an atom. B) The number of protons in an atom. C) The number of neutrons in an atom?. D) The total number of protons and neutrons in an atom. Show Answer Correct Answer: B) The number of protons in an atom. 9. The smallest unit of matter that retains the properties of that matter is A) A molecule. B) A compound. C) A mixture. D) An atom. Show Answer Correct Answer: D) An atom. 10. Which element has 14 protons? A) Nitrogen. B) Silicon. C) Aluminum. D) Sulfur. Show Answer Correct Answer: B) Silicon. 11. Energy is ..... when new bonds form. A) Absorbed. B) Released. C) Lost. D) Gained. Show Answer Correct Answer: B) Released. 12. What would be the average mass of 6 apples? A) 1.0 kg. B) 4.0 kg. C) 0.50 kg. D) 2.0 kg. Show Answer Correct Answer: A) 1.0 kg. 13. It is the amount of heat required to vaporize one mole of a substance at its boiling point. A) Heat of vaporization. B) Molar heat of vaporization. C) Surface tension. D) Vapor pressure. Show Answer Correct Answer: B) Molar heat of vaporization. 14. The Apple is red is an example of? A) Chemical property. B) Chemical change. C) Physical property. D) Physical change. Show Answer Correct Answer: C) Physical property. 15. The tendency of an atom to pull electrons toward itself is referred to as its ..... A) Porlatity. B) Covalency. C) Electronegativity. D) Ionic potential. Show Answer Correct Answer: C) Electronegativity. 16. Iodine can be separated from a mixture of Iodine and Potassium Chloride by? A) Filtration. B) Distillation. C) Sublimation. D) Sedimentation. Show Answer Correct Answer: C) Sublimation. 17. Is used in collecting a pure liquid from mixture of liquids through the processes of evaporation and condensation A) Liquid-liquid extraction. B) Distillation. C) Chromatography. D) Centrifugation. Show Answer Correct Answer: B) Distillation. 18. How are ionic and covalent bonds alike? A) They both form organic molecules. B) They both fill outer electron shells. C) They both transfer electrons from one atom to another. D) They both transfer protons from one atom to another. Show Answer Correct Answer: B) They both fill outer electron shells. 19. Average atomic mass of potassium is 39 amu. what is the mass of 2 mol? A) .39. B) .78. C) 39. D) 78. Show Answer Correct Answer: D) 78. 20. Which of the following symbols does not match the element name given/ A) Al, aluminum. B) Co, copper. C) K, potassium. D) P, phosphorus. Show Answer Correct Answer: B) Co, copper. ← 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