This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 2 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of these reactions is a combustion reaction? A) Production of food by plants with the help of the Sun's energy. B) Rotting of fruits and vegetables. C) Burning wood. D) None of above. Show Answer Correct Answer: C) Burning wood. 2. The number 6.022 x 1023 is called ..... A) A dozen. B) Bohr's number. C) Buckley's number. D) Avogadro's number. Show Answer Correct Answer: D) Avogadro's number. 3. What state of matter has both a definite shape and volume? A) Solid. B) Liquid. C) Gas. D) Plasma. Show Answer Correct Answer: A) Solid. 4. These are forces between atoms and molecules of pure substances ..... A) Van der Waals Forces. B) Intermolecular Forces. C) London Dispersion Forces. D) Coulombic Forces. Show Answer Correct Answer: A) Van der Waals Forces. 5. What is the number of moles in 11 grams of CO2. A) .025. B) 4.0. C) 0.25. D) 44. Show Answer Correct Answer: C) 0.25. 6. What is an atom? A) A positively charged particle. B) The smallest unit of an element. C) A thing the contains matter. D) A negatively charged particle. Show Answer Correct Answer: B) The smallest unit of an element. 7. Why is it important that electrolytes are kept at the correct concentration? A) To keep you awake in lectures. B) So that you can you can become a super hero. C) To maintain cell transport and function, hydration, muscle and nerve cell function and blood pressure etc. D) To live forever. Show Answer Correct Answer: C) To maintain cell transport and function, hydration, muscle and nerve cell function and blood pressure etc. 8. The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is A) Cineole. B) Engenol. C) Geraniol. D) Limonene. Show Answer Correct Answer: A) Cineole. 9. Which of the following are the sub-atomic particles of an atom? A) Proton, Neutron, and Electron. B) Proton, Electron, and Quarks. C) Proton, atomic number, and atomic mass. D) None of above. Show Answer Correct Answer: A) Proton, Neutron, and Electron. 10. How would you neutralize a weak base? A) A weak acid. B) A strong acid. C) A strong base. D) Water. Show Answer Correct Answer: A) A weak acid. 11. The temperature at which a substance changes from solid to liquid. A) Boiling point. B) Melting point. C) Warming point. D) Dripping point. Show Answer Correct Answer: B) Melting point. 12. The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is A) Ozone. B) Helium. C) Oxygen. D) Methane. Show Answer Correct Answer: A) Ozone. 13. Which of the following is NOT a state of matter? A) Solid. B) Liquid. C) Mass. D) Gas. Show Answer Correct Answer: C) Mass. 14. Which activity below does not represent a chemical change? A) Melting ice cubes. B) Decaying leaves. C) Ripening pear. D) Burning logs. Show Answer Correct Answer: A) Melting ice cubes. 15. An element with one electron in its outermost shell will generally form ..... bond. A) Ionic. B) Metallic. C) Covalent. D) None of above. Show Answer Correct Answer: A) Ionic. 16. What is a particle? A) A very small piece of something. B) A planet. C) A part of a machine. D) Anything that has mass and takes up space. Show Answer Correct Answer: A) A very small piece of something. 17. It is defined as how much substance dissolves in a given volume of liquid. A) Density. B) Electric property. C) Magnetic property. D) Solubility. Show Answer Correct Answer: D) Solubility. 18. H2O is a(n) A) Element. B) Compound. C) Atom. D) Delicious and Refreshing Treat. Show Answer Correct Answer: B) Compound. 19. Which of these is a property of metals? A) It's malleable. B) It can't conduct electricity. C) They are used in food. D) It's very brittle. Show Answer Correct Answer: A) It's malleable. 20. =The main active constituent of tea and coffee is A) Aspirin. B) Nicotine. C) Caffeine. D) Chlorophyll. Show Answer Correct Answer: C) Caffeine. ← PreviousNext →Related QuizzesScience QuizzesChemistry Quiz 1Chemistry Quiz 3Chemistry Quiz 4Chemistry Quiz 5Chemistry Quiz 6Chemistry Quiz 7Chemistry Quiz 8Chemistry Quiz 9Chemistry Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books