This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 32 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 32 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the number of neutrons in bromine-80? A) 35. B) 45. C) 80. D) 115. Show Answer Correct Answer: B) 45. 2. Which physical property of matter describes the relationship between mass and volume? A) Weight. B) Reactivity. C) Density. D) None of above. Show Answer Correct Answer: C) Density. 3. Calculate the molar masses of the following compounds and list in the correct order.H2, SO4, (NH4)2CO3, Pb3(PO4)2, C6H12O6, HCl A) 98, 96, 811, 180, 36.5. B) 98, 83, 821, 180, 36.5. C) 96, 36.5, 98, 811, 180. D) 98, 96, 811, 180, 37. Show Answer Correct Answer: A) 98, 96, 811, 180, 36.5. 4. A sample of methane, CH4, occupies 4.50 dm3 (Liters) at STPHow many moles of this gas are present. (Note:One mole of any gas occupies 22.4 liters at STP) A) 2.0. B) 16. C) 24. D) 0.2. Show Answer Correct Answer: D) 0.2. 5. How many hydrogens are in one molecule of water? A) One. B) Two. C) Three. D) Four. Show Answer Correct Answer: B) Two. 6. Which of the following is not a base physical quantity A) Electric current. B) Luminous intensity. C) Force. D) Mass. Show Answer Correct Answer: C) Force. 7. Which one of the following shows the correct charges? A) Proton positiveNeutron negativeElectron negative. B) Proton positiveNeutron neutralElectron negative. C) Proton neutralNeutron positiveElectron negative. D) Proton negativeNeutron nuetralElectron positive. Show Answer Correct Answer: B) Proton positiveNeutron neutralElectron negative. 8. A solution with a pH of 10 has a higher concentration of A) H3O+ than OH-and causes litmus to turn blue. B) H3O+ than OH-and causes methyl orange to turn red. C) OH-than H3O+and causes litmus to turn blue. D) OH-than H3O+and causes methyl orange to turn red. Show Answer Correct Answer: C) OH-than H3O+and causes litmus to turn blue. 9. Electronic configuration of Aluminium ( Al ) is ..... A) [ 2, 8, 1 ]. B) [ 2, 8, 3 ]. C) [ 2, 8, 2 ]. D) [ 2, 8, 4 ]. Show Answer Correct Answer: B) [ 2, 8, 3 ]. 10. Molality (m) = moles of solute / ..... A) Kilogram of solvent. B) Kiloliter of solvent. C) Kilometer of solvent. D) Ounces of solvent. Show Answer Correct Answer: A) Kilogram of solvent. 11. The order of elements in the periodic table is based on A) The number of protons in the nucleus. B) Electric charge of nucleus. C) The number of neutrons in the nucleus. D) Atomic mass. Show Answer Correct Answer: A) The number of protons in the nucleus. 12. An electron-dot diagram shows only the A) Neutrons. B) Valence electrons. C) Protons. D) Nucleus. Show Answer Correct Answer: B) Valence electrons. 13. How many different oxides are formed by nitrogen? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: B) 2. 14. If I gain electrons I become A) Positive because I've added to my atom. B) Negative because I've added electrons. C) Same because i'm balanced. D) Equal because now I have electrons. Show Answer Correct Answer: B) Negative because I've added electrons. 15. Which element has an atom with the greatest tendency to attract electrons in a chemical bond? A) C. B) Si. C) S. D) Cl. Show Answer Correct Answer: D) Cl. 16. An atom can be described as chemically inactive (will not form bonds) if its outermost electron shell contains ..... electrons. A) 8. B) 9. C) 1. D) None of above. Show Answer Correct Answer: A) 8. 17. Which macromolecule is the most abundant in our bodies? A) Proteins. B) Lipids. C) Carbohydrates. D) Water. Show Answer Correct Answer: A) Proteins. 18. N2 + 3H2 $\rightarrow$ 2NH3 How many moles of hydrogen are needed to react with 5 moles of nitrogen? A) 6. B) 2. C) 3. D) 15. Show Answer Correct Answer: D) 15. 19. Which has a charge of 1+? A) Proton. B) Atom. C) Electron. D) Neutron. Show Answer Correct Answer: A) Proton. 20. Kg is equal to A) .052400 grams. B) 54200 grams. C) 54200 mg. D) 125 pounds. Show Answer Correct Answer: B) 54200 grams. ← 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