This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 63 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 63 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Our rock candy created this formation A) Crystals. B) Granules. C) Crumbs. D) Pebbles. Show Answer Correct Answer: A) Crystals. 2. What is a mole? A) 6.022 x 1023 particles of any substance. B) 1 gram of a substance. C) 1 mL of a substance. D) None of above. Show Answer Correct Answer: A) 6.022 x 1023 particles of any substance. 3. Protons A) Negative charge, nucleus. B) Positive charge, shells. C) Positive charge, nucleus. D) Neutral charge, nucleus. Show Answer Correct Answer: C) Positive charge, nucleus. 4. Covalent compounds A) Share electrons. B) Transfer electrons. C) Contain a sea of electrons. D) Conduct electricity. Show Answer Correct Answer: A) Share electrons. 5. How many PROTONS would a mole of H atoms have? A) There is no way to know. B) 1. C) 2. D) 6.02 x 1023 protons. Show Answer Correct Answer: D) 6.02 x 1023 protons. 6. Which method uses the boiling point differences by gradually heated a mixture? The substance that vaporize the easiest will separate first. A) Filtration. B) Decantation. C) Distillation. D) Mechanical separation. Show Answer Correct Answer: A) Filtration. 7. What is the mass number of an element? A) Number of protons. B) Protons + neutrons. C) Protons + electrons. D) Protons-electrons. Show Answer Correct Answer: B) Protons + neutrons. 8. If Gibbs free energy is greater than 0, what is the possible chemical reaction? A) Non-Spontaneous. B) Spontaneous. C) Neither. D) Nothing will happen. Show Answer Correct Answer: A) Non-Spontaneous. 9. The items amenable to detection by soft x-rays are A) Narcotics. B) Contrabands. C) Lead in bullets. D) Genuine coins from counterfeit coins. Show Answer Correct Answer: D) Genuine coins from counterfeit coins. 10. What is 5.260 x 10 5 expressed in standard notation? A) 0.00005260. B) 5260. C) 526000000. D) 526000. Show Answer Correct Answer: D) 526000. 11. A temperature increase causes the particles ..... A) To slow down. B) To move faster. C) Collide higher. D) In the right order. Show Answer Correct Answer: B) To move faster. 12. In a chemical reaction, activation energy increases the ..... of the reactants. A) Amount of chemical energy. B) Number of particles. C) Temperature. D) None of above. Show Answer Correct Answer: C) Temperature. 13. Measure mainly of the nuclear particles:protons + neutrons A) Subatomic Particles. B) Atomic Number. C) Atomic Mass. D) Gluons. Show Answer Correct Answer: C) Atomic Mass. 14. How many elements are in the following equation:HO2C A) 2. B) 1. C) 4. D) 3. Show Answer Correct Answer: D) 3. 15. The particles that are found in the nucleus of an atom are A) Neutrons and electrons. B) Electrons only. C) Protons and neutrons. D) Protons and electrons. Show Answer Correct Answer: C) Protons and neutrons. 16. Which gas is used in fire extinguishers? A) Nitrogen oxide. B) Carbon dioxide. C) Sulpher dioxide. D) Carbon monoxide. Show Answer Correct Answer: B) Carbon dioxide. 17. The most electropositive elements among the following is A) Ca. B) Cs. C) Na. D) Br. Show Answer Correct Answer: B) Cs. 18. The energy-transfer molecule formed in cell respiration is A) DNA. B) Protein. C) Glucose. D) ATP. Show Answer Correct Answer: D) ATP. 19. Which of the following are the pre-existing nucleons that were produced after the explosion. A) Protons and Neutrons. B) Protons and electrons. C) Neutrons only. D) None of above. Show Answer Correct Answer: A) Protons and Neutrons. 20. All cell membranes are made of A) Phospholipids. B) DNA. C) Amino acids. D) Glucose. Show Answer Correct Answer: A) Phospholipids. ← 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