This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry Basics > Chemistry – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 9 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which is a physical change? A) Burning coal. B) Tearing paper. C) Digesting food. D) Iron rusting. Show Answer Correct Answer: B) Tearing paper. 2. A mixture in which two or more substances are evenly mixed but not bonded together A) Heterogeneous mixture. B) Physical change. C) Homogeneous mixture. D) Chemical change. Show Answer Correct Answer: C) Homogeneous mixture. 3. What are chemical reactions that absorb energy? A) Endothermic. B) Fast. C) Slow. D) Exothermic. Show Answer Correct Answer: A) Endothermic. 4. The atomic number of an elements is the total number of which particles in the nucleus? A) Neutrons. B) Protons. C) Electrons. D) Protons and electrons. Show Answer Correct Answer: B) Protons. 5. What is the mass of a proton and a neutron? A) 1amu. B) 2grams. C) 13amu. D) 10cm. Show Answer Correct Answer: A) 1amu. 6. The branch of chemistry that uses mathematics and computers to design and predict the properties of new compounds. A) Biochemistry. B) Organic chemistry. C) Analytical chemistry. D) Theoretical chemistry. Show Answer Correct Answer: D) Theoretical chemistry. 7. Achemical equation shows how the combination of elementsand compounds can create different products. According to the law of conservation of matter, which of the followingis true? A) Thereare no more atoms remaining at the end of the chemical reaction. B) Thechemical reaction can only produce compounds, not individual elements. C) Thenumber of atoms for each element remains the same throughout the chemicalreaction. D) Thenumber of atoms for each element must increase in order for a chemical reactionto take place. Show Answer Correct Answer: C) Thenumber of atoms for each element remains the same throughout the chemicalreaction. 8. Which of the following branches of chemistry involves the study of effects of harmful gases on the atmosphere? A) Nuclear chemistry. B) Analytical chemistry. C) Environmental chemistry. D) Organic chemistry. Show Answer Correct Answer: C) Environmental chemistry. 9. Which compound would decolourize bromine water in the dark? A) CH3COCH2CH3. B) CH3(CH2)4OH. C) CH3CHCHCH3. D) CH3(CH2)3CH3. Show Answer Correct Answer: C) CH3CHCHCH3. 10. Does the temperature of water affect the time it takes a sugar cube to dissolve? What is the IV (independent variable) in this experiment? A) IV:Type of waterDV:Dissolving rate. B) IV:Temperature of waterDV:type of sugar cube. C) IV:Temperature of WaterDV:Dissolving Rate. D) IV:TimeDV:Number of sugar. Show Answer Correct Answer: C) IV:Temperature of WaterDV:Dissolving Rate. 11. Glucose, fructose, and galactose are all examples of a A) Monosaccharide. B) Disaccharide. C) Polysaccharide. D) None of above. Show Answer Correct Answer: A) Monosaccharide. 12. What is the formula for potassium fluoride? A) KF2. B) K2F. C) KF. D) K2F2. Show Answer Correct Answer: C) KF. 13. The branch of analytical chemistry that answers the question what is present? A) Quantitative. B) Qualitative. C) Quarantine. D) Quackitative. Show Answer Correct Answer: B) Qualitative. 14. Subscripts tell how many ..... of each element are in the compound. A) Protons. B) Neutrons. C) Nothing, compound have exponents. D) Atoms. Show Answer Correct Answer: D) Atoms. 15. Meaning of Matter A) Substances. B) Volume. C) Mass. D) None of above. Show Answer Correct Answer: A) Substances. 16. A chemical reaction that absorbs energy in the form of heat is described as: A) Unbalanced. B) Endothermic. C) Exothermic. D) Coefficient. Show Answer Correct Answer: B) Endothermic. 17. What effect of optical isomers on plane-polarized light can be measured using a polarimeter? A) Reflection. B) Emission. C) Rotation. D) Absorption. Show Answer Correct Answer: C) Rotation. 18. Table salt is an example of a ..... A) Pure element. B) Pure compound. C) Heterogeneous mixture. D) Homogeneous mixture. Show Answer Correct Answer: B) Pure compound. 19. What two types of atoms make a covalent bond? A) 2 Nonmetals. B) 1 Nonmetal and 1 Metal. C) 2 Metals. D) 2 Noble Gases. Show Answer Correct Answer: A) 2 Nonmetals. 20. Which of the following gives an accurate definition for a weak acid? A) An acid with a low pH value. B) An acid with a low concentration of hydrogen ions. C) An acid that ionises partially in water. D) An acid that reacts slowly with magnesium. Show Answer Correct Answer: C) An acid that ionises partially in water. ← 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