This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry Basics > Chemistry – Quiz 45 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 45 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is an example of the law of conservation of matter? A) 60 g + 20 g $\rightarrow$ 15 g + 30 g. B) P2H5OH $\rightarrow$ 2P + 6H + O. C) N2O + H $\rightarrow$ H2O + N. D) 40 g + 3 g $\rightarrow$ 10 g + 13g. Show Answer Correct Answer: B) P2H5OH $\rightarrow$ 2P + 6H + O. 2. In order to convert to Kelvin, you add ..... to the Celsius measurement. A) 372. B) 273. C) 237. D) 732. Show Answer Correct Answer: B) 273. 3. It is one of the frontiers that the chemists are currently exploring in relation to the discovery and development of viable alternative source of power that can be utilize for the consumption of the people. A) Health and Medicine. B) Food and Agriculture. C) Materials and Technology. D) Energy and Environment. Show Answer Correct Answer: D) Energy and Environment. 4. Substances that are formed during a chemical change are known as: A) Catalysts. B) Precipitates. C) Products. D) Reactants. Show Answer Correct Answer: C) Products. 5. The family in the periodic table that contains the most reactive metals is the ..... A) Alkaline Earth Metals. B) Transition Metals. C) Alkali Metals. D) Other Metals. Show Answer Correct Answer: C) Alkali Metals. 6. A layer of white solid formed quickly when a piece of sodium is placed on a table in room condition. What is the identity of the white solid? A) NaCl. B) Na. C) NaOH. D) Na2O. Show Answer Correct Answer: D) Na2O. 7. An ionic bond forms when A) Valence electrons are shared. B) A sea of mobile electrons surround the cations. C) Valence electrons are transferred between atoms. D) None of the above. Show Answer Correct Answer: C) Valence electrons are transferred between atoms. 8. ..... is the branch of chemistry that would measure the amount of energy an atom absorbs in nuclear reaction. A) Physical Chemistry. B) Organic Chemistry. C) Biochemistry. D) None of above. Show Answer Correct Answer: A) Physical Chemistry. 9. A substance whose all the atoms have same atomic number is called ..... A) Element. B) Molecule. C) Compound. D) None of above. Show Answer Correct Answer: A) Element. 10. A can of Coke will sink in a bowl of water. A can of Diet Coke will float in a bowl of water. What does this tell you about the density of the Diet Coke? A) It is bigger than 1. B) It is smaller than 1. C) It is equal to 1. D) It is equal to-1. Show Answer Correct Answer: B) It is smaller than 1. 11. What is the formula for the compound formed by iron (II) ions and chromate ions? A) Fe2(CrO4)3. B) Fe(CrO4)2. C) FeCrO4. D) Fe2CrO4. Show Answer Correct Answer: C) FeCrO4. 12. What is the subscript in $ 3CaCl_2$ A) 3. B) Ca. C) 2. D) Cl. Show Answer Correct Answer: C) 2. 13. What is the meaning of green technology? A) Green colored technology. B) Application developed to minimize the negative effect of harmful human activities. C) Technology for green plants. D) Study on producing substances at nanoscale. Show Answer Correct Answer: B) Application developed to minimize the negative effect of harmful human activities. 14. PVC pipe is an example of which of the following? A) Polymer. B) Covalent compound. C) Bondings. D) Iconic bonds. Show Answer Correct Answer: A) Polymer. 15. A student determined the heat of fusion of water to be 88 calories per gram. If the accepted value is 80. calories per gram, what is the student's percent error? A) 5.0%. B) 90.%. C) 11%. D) 10%. Show Answer Correct Answer: D) 10%. 16. Whether or not bonds form is due to the? ? ? ? ? A) Valence electron configurations. B) Protons. C) Atomic mass. D) Chance. Show Answer Correct Answer: A) Valence electron configurations. 17. No sides and no angles are equal (~90$^ \circ$) A) Monoclinic. B) Triclinic. C) Rhombohedral. D) None of above. Show Answer Correct Answer: B) Triclinic. 18. A $ free\ radical$ is ..... A) Positively charged. B) Negatively charged. C) Neutral. D) None of above. Show Answer Correct Answer: C) Neutral. 19. When atoms share electrons, the electrical attraction of an atom for the electrons is called the atom's A) Electron affinity. B) Electronegativity. C) Resonance. D) Hybridization. Show Answer Correct Answer: B) Electronegativity. 20. Chlorine gas is ..... colour A) Purplish black. B) Reddish brown. C) Greenish yellow. D) None of above. Show Answer Correct Answer: C) Greenish yellow. ← PreviousNext →Related QuizzesChemistry QuizzesScience QuizzesChemistry Quiz 1Chemistry Quiz 2Chemistry Quiz 3Chemistry Quiz 4Chemistry Quiz 5Chemistry Quiz 6Chemistry Quiz 7Chemistry Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books