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. What is the name given to a set of controlled observations that test a proposed explanation? A) Hypothesis. B) Experiment. C) Theory. D) Conclusion. Show Answer Correct Answer: B) Experiment. 2. The ability to change into a different substance A) Chemical property. B) 360 ooga booga. C) Physical property. D) Volume. Show Answer Correct Answer: A) Chemical property. 3. Choose the correct facts A) Oil has high melting points. B) Fats have a high percentage of saturated fatty acids. C) Fats have low melting points. D) Oil has a solid physical state. Show Answer Correct Answer: B) Fats have a high percentage of saturated fatty acids. 4. Molecular compounds are different from ionic compounds by ..... A) Molecular compounds share electrons. B) Molecular compounds give or take electrons. C) Molecular compounds contain a metal. D) Molecular compounds are shiny and conductive. Show Answer Correct Answer: A) Molecular compounds share electrons. 5. An element has the mass number 12 and atomic number 6. The number of neutrons in it is: A) 6. B) 10. C) 4. D) 8. Show Answer Correct Answer: A) 6. 6. Density is A) Matter/solids. B) Volume/mass. C) Gas/liquid. D) Mass/volume. Show Answer Correct Answer: D) Mass/volume. 7. Convert 3045 cm to km A) .03045 km. B) 0.3045 km. C) 3.045 km. D) 30.45 km. Show Answer Correct Answer: A) .03045 km. 8. These elements are called semiconductors. A) Metals. B) Nonmetals. C) Metalloids. D) The guy at the front of a train. Show Answer Correct Answer: C) Metalloids. 9. How many elements are represented in the compound? Na2CO3 A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: C) 3. 10. The atomic number tells you what? READ THE ANSWERS CAREFULLY A) Only the number of electrons. B) Only the number of protons. C) Only the number of neutrons. D) The number of both electrons and protons in an atom. Show Answer Correct Answer: B) Only the number of protons. 11. James observes that a yellow, solid substance has formed when he mixes two clear liquids together. He believes that a chemical change has taken place. Which of the following statements is true? A) James is correct because only a mixture was formed and no new substances. B) James is correct because a new substance with new properties was formed. C) James is incorrect because no chemical reaction occurred. D) James is incorrect because it was a physical change and not a chemical change. Show Answer Correct Answer: B) James is correct because a new substance with new properties was formed. 12. ..... is the branch of chemistry that would analyze new chemicals made from carbon-containing building blocks. A) Inorganic Chemistry. B) Organic Chemistry. C) Biochemistry. D) Analytical Chemistry. Show Answer Correct Answer: B) Organic Chemistry. 13. The B-F bond in BF3 (electronegativity for B is 2.0; electronegativity for F is 4.0) is A) Polar covalent. B) Ionic. C) Nonpolar covalent. D) Pure covalent. Show Answer Correct Answer: B) Ionic. 14. The Law of Multiple Proportions states A) When two elements combine with each other to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers. B) That every chemical compound contains fixed and constant proportions (by mass) of the elements that make up that compound. C) That matter is neither created nor destroyed, only changed during chemical reactions. D) None of above. Show Answer Correct Answer: A) When two elements combine with each other to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers. 15. What two substance are formed when an acid and alkali react together in equal amounts? A) Salt and water. B) Alkali and water. C) Acid and water. D) Acid and alkali. Show Answer Correct Answer: A) Salt and water. 16. He was the Greek philosopher who popularized atomism. A) Democritus. B) Melitus. C) Epicurus. D) Leucippus. Show Answer Correct Answer: C) Epicurus. 17. A change in the size, shape, form, or state of matter that does not change the matter's identity A) Physical change. B) Physical property. C) Chemical change. D) Chemical property. Show Answer Correct Answer: A) Physical change. 18. Diamond is an example of ..... A) Giant molecule. B) Simple molecule. C) Ionic compound. D) Metallic bond. Show Answer Correct Answer: A) Giant molecule. 19. What is the definition of saturated? A) No single bonds. B) Contains Carbon-Carbon double bond. C) All Carbon-Carbon bonds are double. D) All Carbon-Carbon bonds are single. Show Answer Correct Answer: D) All Carbon-Carbon bonds are single. 20. Calculate volume in milliliters of 100 g of coconut oil, which has a density of 0.92g/mL. A) 108.7 ml. B) 108.7 L. C) 108.7. D) 100 g/mL. Show Answer Correct Answer: A) 108.7 ml. ← 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