This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 50 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 50 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A small quantity of salt is stirred into a liter of water until it dissolves. In the resulting mixture, the salt is A) The solute. B) The solvent. C) The filtrate. D) The precipitate. Show Answer Correct Answer: A) The solute. 2. Brain Teaser:A magnesium atom has an atomic number of 12, an atomic mass of 25, and a +2 charge. This atom would contain ..... protons, ..... neutrons, and ..... electrons. A) 12; 25; 2. B) 12; 13; 14. C) 12; 13; 10. D) None of above. Show Answer Correct Answer: C) 12; 13; 10. 3. Atomic number is equal to A) Number of nutron. B) Number of protons. C) Number of electrons. D) Total number of protons and neutrons. Show Answer Correct Answer: B) Number of protons. 4. Mary wants to get the iron filings out of some fine sand, what could be used to separate these two solids? A) Magnet. B) Sieve. C) Evaporation. D) Decantation. Show Answer Correct Answer: A) Magnet. 5. How many dots does the electron-dot diagram of nitrogen have? A) 5. B) 15. C) 7. D) 3. Show Answer Correct Answer: A) 5. 6. An arrangement of the elements according to their atomic numbers so that elements with similar properties are in the same column and properties repeat from row to row A) Periodic Table of Elements. B) Atomic Theory. C) Isotopes. D) Subatomic Particles. Show Answer Correct Answer: A) Periodic Table of Elements. 7. Which is not a type of elements? A) Metals. B) Gases. C) Metalloids. D) Non Metals. Show Answer Correct Answer: B) Gases. 8. Which of the following elements has a complete outer shell? A) Fluorine. B) Sulfur. C) Sodium. D) Neon. Show Answer Correct Answer: D) Neon. 9. A covalent bond forms when A) Valence electrons are shared. B) Electrons are gained or lost. C) Polar molecules are attracted to one another. D) None of the above. Show Answer Correct Answer: A) Valence electrons are shared. 10. What is the name of an element that has a charge? A) Isotope. B) Atom. C) Ion. D) None of above. Show Answer Correct Answer: C) Ion. 11. What experiment led to the discovery of the electron? A) Oil-drop experiment. B) Plum pudding experiment. C) Gold foil experiment. D) Cathode ray tube experiment. Show Answer Correct Answer: D) Cathode ray tube experiment. 12. The most abundant rare gas in the atmosphere is? A) Ar. B) Ne. C) He. D) Xe. Show Answer Correct Answer: A) Ar. 13. The first metal used by man was A) Iron. B) Gold. C) Bronze. D) Copper. Show Answer Correct Answer: D) Copper. 14. Isotopes are the same elements with different number of ..... A) Protons. B) Electrons. C) Neutrons. D) Atoms. Show Answer Correct Answer: C) Neutrons. 15. The macromolecules DNA and RNA are ..... A) Carbohydrates. B) Lipids. C) Nucleic acids. D) Proteins. Show Answer Correct Answer: C) Nucleic acids. 16. This is the organized chart of elements. A) Periodic Table of Elements. B) Periodic Chart of Elements. C) Periodic Graph of Elements. D) None of these. Show Answer Correct Answer: A) Periodic Table of Elements. 17. Which of the following intermolecular force present in CHF3? A) Dipole-dipole. B) Dispersion. C) H-bond. D) Ionic. Show Answer Correct Answer: A) Dipole-dipole. 18. The monomer of a protein is a(n) ..... A) Monosaccharides. B) Lipids. C) Nucleotides. D) Amino acids. Show Answer Correct Answer: D) Amino acids. 19. The saltiness of seawater is the result of this property A) Reactivity. B) Composition. C) Solubility. D) None of above. Show Answer Correct Answer: C) Solubility. 20. # neutrons + # protons = ..... A) Atomic number. B) Atomic thing. C) Mass Number. D) Valence Electrons. Show Answer Correct Answer: C) Mass Number. ← 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