This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 34 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 34 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What are the four main types of molecules found in the cells of living things? A) Carbohydrates, lipids, nucleic acids, and proteins. B) Lipids, nutrients, nucleic acids, and carbon dioxide. C) Carbon dioxide, hydrogen, oxygen, and various salts. D) Atoms, molecules, chemical compounds, andcarbohydrates. Show Answer Correct Answer: A) Carbohydrates, lipids, nucleic acids, and proteins. 2. Which statement about stereoisomers is correct? A) 1, 2-dichloroethane has two geometrical isomers. B) 1, 2-dichloroethane has two optical isomers. C) 1, 2-dichloroethene has two geometrical isomers. D) 1, 2-dichloroethene has two optical isomers. Show Answer Correct Answer: C) 1, 2-dichloroethene has two geometrical isomers. 3. Bad effect of food additives when take excessively is A) Cough. B) Nothing happened. C) Cancer. D) Fever. Show Answer Correct Answer: C) Cancer. 4. What would you be able to do with a filter, magnet, or strainer when thinking about a mixture? A) Separate them. B) Combine them chemically. C) Combine them physically. D) None of above. Show Answer Correct Answer: A) Separate them. 5. Alkane molecules are made of which elements? A) Carbon and hydrogen. B) Carbon, hydrogen and oxygen. C) Carbon and oxygen. D) Carbon, nitrogen and hydrogen. Show Answer Correct Answer: A) Carbon and hydrogen. 6. Which of the following is the chemical symbolfor the element hydrogen? A) 1. B) 1.008. C) H. D) He. Show Answer Correct Answer: C) H. 7. Which of the following is not evidence that a chemical reaction has occurred? A) Sound is given off. B) Gas bubbles escape. C) The shape of the object changes. D) The temperature changes. Show Answer Correct Answer: C) The shape of the object changes. 8. Group of elements whose ending e-configuration is s1, most reactive metals with the exception of hydrogen. Easily lose electrons. A) Halogens. B) Alkali metals. C) Alkaline earth metals. D) Chalcogens. Show Answer Correct Answer: B) Alkali metals. 9. Atoms are the basic units of ..... A) Elements. B) Pure substances. C) The atmosphere. D) Matter. Show Answer Correct Answer: D) Matter. 10. If the density of a liquid is 0.80 g/mL, what is its specific gravity? ( at Room Temp.) A) 0.8 ml. B) 0.8 L. C) 0.8. D) 0.8 g/mL. Show Answer Correct Answer: C) 0.8. 11. Which of the following are pure substances? A) Elements. B) Colloids. C) Heterogeneous mixture. D) Solutions. Show Answer Correct Answer: A) Elements. 12. The pH of milk is 6.4. Based on this information, which of the following statements best describes milk? A) Very Basic. B) Slightly Basic. C) Very Acidic. D) Slightly Acidic. Show Answer Correct Answer: D) Slightly Acidic. 13. Ernst Rutherford discovered which part of the atom throught the use of gold foil? A) Proton. B) Neutron. C) Electron. D) Orbitals. Show Answer Correct Answer: A) Proton. 14. Silvery grey iron filings (density = 7.87 g/cm3) are added to yellow sulfur powder (density = 1.96 g/cm3) in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid (density = 4.84 g/cm3), which cannot be separated by physical means. Which of the following best describes the dark grey, dull solid? A) An element. B) A compound. C) A heterogeneous mixture. D) A homogeneous mixture. Show Answer Correct Answer: B) A compound. 15. A ..... has a definite ratio of components A) Compound. B) Mixture. C) Solvent. D) Solute. Show Answer Correct Answer: A) Compound. 16. In order to survive, the flower sitting on the restaurant table needs water, carbon dioxide, andoxygen. What element do all three ofthese have in common? A) They are all different elements. B) Oxygen. C) Hydrogen. D) Carbon. Show Answer Correct Answer: B) Oxygen. 17. This rule says that the amount of atoms in the reactants is equal to the amount of atoms in the products ..... A) Conservation of Energy. B) E=MC2. C) Conservation of Mass. D) Rule of 8. Show Answer Correct Answer: C) Conservation of Mass. 18. How many protons does the elemental atom of nitrogen contain? A) 4. B) 7. C) 14.0. D) 21. Show Answer Correct Answer: B) 7. 19. What does temperature measure? A) Heat. B) Average kinetic energy. C) Space. D) Time. Show Answer Correct Answer: B) Average kinetic energy. 20. What subatomic particles found in the nucleus have no charge? A) Protons. B) Neutrons. C) Electrons. D) None of above. Show Answer Correct Answer: B) Neutrons. ← 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