This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry Basics > Chemistry – Quiz 49 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 49 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Identifies an unknown through by determining its composition. A) Analytical. B) Physical. C) Organic. D) Biochemistry. Show Answer Correct Answer: A) Analytical. 2. What charge does the nucleus have and why? A) Positive-the neutrons do not have a charge. B) Positive-the neutrons and protons are positively charged particles. C) Neutral-the neutral charge dominates the positive charge. D) Neutral-electrons cancel out the positive charge of the atom. Show Answer Correct Answer: A) Positive-the neutrons do not have a charge. 3. If a mixture has components you can see it is a ..... A) Solution. B) Compound. C) Homogeneous mixture. D) Heterogeneous mixture. Show Answer Correct Answer: D) Heterogeneous mixture. 4. How many carbon atoms are in ethane? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: B) 2. 5. What is the molar mass of table salt (NaCl)? A) 116.886 g/mol. B) 35.453 g/mol. C) 22.990 g/mol. D) 58.443 g/mol. Show Answer Correct Answer: D) 58.443 g/mol. 6. What is the name of the compound AlPO4? A) Aluminum phosphate. B) Aluminum phosphide. C) Aluminum phosphite. D) Aluminum phosphoroxide. Show Answer Correct Answer: A) Aluminum phosphate. 7. Which conditions are required to obtain a good yield of a carboxylic acid when ethanol is oxidized using potassium dichromate(VI), K2Cr2O7(aq)? I. Add sulfuric acidII. Heat the reaction mixture under refluxIII. Distill the product as the oxidizing agent is added A) I and II only. B) II and III only. C) I and III only. D) I, II and III. Show Answer Correct Answer: A) I and II only. 8. A combination that can be separated by physical processes is a ..... A) Pure Substance. B) Glucose. C) Element. D) Mixture. Show Answer Correct Answer: D) Mixture. 9. The chemical formula of lead sulphate is: A) Pb2SO4. B) Pb(SO4)2. C) PbSO4. D) Pb2(SO4)3. Show Answer Correct Answer: C) PbSO4. 10. How many electrons should Carbon have around its Lewis dot model? A) 1. B) 3. C) 4. D) 5. Show Answer Correct Answer: C) 4. 11. Whenclassifying a solution of KoolAid, sugar, and water, a student found it to bewhich of the following? A) An element. B) A compound. C) A homogeneous mixture. D) A heterogeneous mixture. Show Answer Correct Answer: C) A homogeneous mixture. 12. An electron has a ..... charge. A) Negative. B) Positive. C) Neutral. D) None of above. Show Answer Correct Answer: A) Negative. 13. The columns are called families. What characteristics do chemical families share? A) Same state of matter. B) Same number of valence electrons. C) Same number of neutrons. D) Same physical properties. Show Answer Correct Answer: B) Same number of valence electrons. 14. Which of the following is NOT an example of a molecular formula? A) H2O. B) B. C) NH3. D) O2. Show Answer Correct Answer: B) B. 15. What type of chemical reaction is this one? Ca + MgCl2 $\rightarrow$ CaCl2 + Mg A) Decomposition. B) Combustion. C) Synthesis. D) Single Replacement. Show Answer Correct Answer: D) Single Replacement. 16. G of sugar is a measure of what? A) Gravity. B) Weight. C) Inertia. D) Mass. Show Answer Correct Answer: D) Mass. 17. Which group or family of the periodic table will not naturally form compounds with any atom? A) Halogens. B) Nobel Gases. C) Alkali Metals. D) Alkaline Earth Metals. Show Answer Correct Answer: B) Nobel Gases. 18. Which molecule exhibits optical isomerism? A) 3-iodopentane. B) 2-iodo-2-methylpropane. C) 1, 3-diiodopropane. D) 2-iodobutane. Show Answer Correct Answer: D) 2-iodobutane. 19. Which branch of Chemistry would study rubbing alcohol (C3H8O) and its reactions? A) Physical. B) Biochemical. C) Organic. D) Inorganic. Show Answer Correct Answer: C) Organic. 20. Which does silicon dioxide (SiO2) represent? A) Element. B) Compound. C) Homogeneous mixture. D) Heterogeneous mixture. Show Answer Correct Answer: B) Compound. ← 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