This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 53 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 53 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Mass number of a nucleus is A) Always less than its atomic number. B) Always more than the atomic weight. C) The sum of the number of protons and neutrons present in the nucleus. D) None of these. Show Answer Correct Answer: C) The sum of the number of protons and neutrons present in the nucleus. 2. Speed up chemical reactions A) Catalysts. B) Hormones. C) Salts. D) Acids. Show Answer Correct Answer: A) Catalysts. 3. Matter that has a definite shape and a definite volume is A) A liquid. B) A element. C) A solid. D) A gas. Show Answer Correct Answer: C) A solid. 4. Compounds that form hydrogen ions in solution is A) A solution. B) A base. C) An acid. D) A proton. Show Answer Correct Answer: C) An acid. 5. Compounds containing one or more benzene rings are called A) Alkanes. B) Alliphatic compounds. C) Alicyclic compounds. D) Aromatic compounds. Show Answer Correct Answer: D) Aromatic compounds. 6. A separation technique where each component or solute is isolated on different affinities to mobile phase A) Liquid-liquid extraction. B) Distillation. C) Chromatography. D) Centrifugation. Show Answer Correct Answer: C) Chromatography. 7. A particle that moves around the nucleus is a(n) ..... A) Proton. B) Neutron. C) Electron. D) Quark. Show Answer Correct Answer: C) Electron. 8. The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of A) Metallurgy. B) Atomic structure. C) Discovery of elements. D) Periodic table of contents. Show Answer Correct Answer: D) Periodic table of contents. 9. Which of the following is a definition of a molecule? A) Group of atoms chemically bonded together. B) Group of electrons held together. C) Group of protons held together. D) Group of neutrons held together. Show Answer Correct Answer: A) Group of atoms chemically bonded together. 10. Which of the following is NOT soluble in water? A) Ions. B) Salts. C) Sugars. D) Lipids. Show Answer Correct Answer: D) Lipids. 11. Average atomic mass of cesium is 133. what is the mass of 3 mol? A) .133. B) 133. C) 266. D) 399. Show Answer Correct Answer: D) 399. 12. How many total electrons does Na+1 (a sodium ion) have? A) 10. B) 11. C) 12. D) 22. Show Answer Correct Answer: A) 10. 13. Which subatomic part of an atom gives it a positive charge? A) Neutron. B) Proton. C) Electron. D) Nucleus. Show Answer Correct Answer: B) Proton. 14. This is a type of mixture where one substance dissolves into another A) Solution. B) Miscibility. C) Compound. D) Solubility. Show Answer Correct Answer: A) Solution. 15. Hydrogen gas (H2) is an example of a A) Molecule. B) Compound. C) Both a molecule and a compound. D) None of above. Show Answer Correct Answer: A) Molecule. 16. Protons have a ..... charge. A) Negative. B) Positive. C) Neutral. D) None of above. Show Answer Correct Answer: B) Positive. 17. This monosaccharide is not involved in energy production but the structural components of the nucleic acids A) Glucose. B) Fructose and galactose. C) Sucrose. D) Deoxyribose. Show Answer Correct Answer: D) Deoxyribose. 18. Which scientist described a positively charged core ("nucleus" ) in the middle of a lot of empty space? A) Chadwick. B) Thomson. C) Rutherford. D) Bohr. Show Answer Correct Answer: C) Rutherford. 19. As the temperature goes up, the solubility of all solids in water A) Decreases. B) Increases. C) Remains the same. D) It depends upon the solid. Show Answer Correct Answer: B) Increases. 20. Chemical used in photography is A) Sodium oxalate. B) Sodium sulphite. C) Sodium sulphate. D) Sodium thiosulphate. Show Answer Correct Answer: D) Sodium thiosulphate. ← 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