This quiz works best with JavaScript enabled. Home > General Knowledge > Science > Chemistry > Chemistry – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 9 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How many molecules are in 2.10 mol CO? A) 3.49 X 10-24 molecules. B) 3.79 x 1024 molecules. C) 2.53 x 1024 molecules. D) 1.26 X 1024 molecules. Show Answer Correct Answer: D) 1.26 X 1024 molecules. 2. Which of the following is an empirical formula? A) C3H8O. B) Be2(Cr2O7)2. C) C2N2H8. D) Sb4S6. Show Answer Correct Answer: A) C3H8O. 3. What charge do electrons have? A) Positive. B) Neutral. C) Negative. D) None of above. Show Answer Correct Answer: C) Negative. 4. The two groups of substances are A) Elements and compounds. B) Mixtures and solutions. C) Homogeneous and heterogeneous. D) Chemical and physical. Show Answer Correct Answer: A) Elements and compounds. 5. What are the main elements found in all living things? A) CHO. B) CHON. C) CHONPS. D) CH. Show Answer Correct Answer: C) CHONPS. 6. What charge do neutrons have? A) Positive. B) Neutral. C) Negative. D) None of above. Show Answer Correct Answer: B) Neutral. 7. What are the parts of an atom that carry a charge? A) Proton and Neutrons. B) Neutrons and Electrons. C) Protons and Electrons. D) Protons, Neutrons and electrons. Show Answer Correct Answer: C) Protons and Electrons. 8. The number of electrons presents in H+ is A) 3. B) 0. C) 1. D) 2. Show Answer Correct Answer: B) 0. 9. CH4 is a/an ..... compound A) Covalent. B) Molecular Solid. C) Ionic. D) Electrovalent. Show Answer Correct Answer: A) Covalent. 10. What effect do enzymes have on the rate (speed) of a reaction? A) Increase the speed. B) Decrease the speed. C) Have no effect on the speed. D) Monitor the speed. Show Answer Correct Answer: A) Increase the speed. 11. The maximum number of covalent formed by nitrogen is A) 3. B) 2. C) 1. D) 4. Show Answer Correct Answer: D) 4. 12. If you change a substance into a new substance ..... A) Physical Change. B) Partial Change. C) Freezing. D) Chemical Change. Show Answer Correct Answer: D) Chemical Change. 13. What is the maximum number of electrons found in the innermost (first) shell. A) 2. B) 5. C) 8. D) 3. Show Answer Correct Answer: A) 2. 14. G of beryllium (Be) contains how many moles? A) 0.25 mol. B) 320 mol. C) 4.0 mol. D) 45 mol. Show Answer Correct Answer: C) 4.0 mol. 15. If the atomic mass of carbon is 12, 1 mole of pure carbon would have a mass A) 6 mol. B) 6g. C) 12 g. D) 12 mol. Show Answer Correct Answer: C) 12 g. 16. The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3 A) 4. B) 3. C) 2. D) 1. Show Answer Correct Answer: A) 4. 17. Matter are anything that A) Has mass but doesn't occupies space. B) Only has mass. C) Has mass and occupies space. D) None of above. Show Answer Correct Answer: C) Has mass and occupies space. 18. A substance that speeds up the rate of a chemical reaction is called A) A lipid. B) An element. C) A molecule. D) A catalyst. Show Answer Correct Answer: D) A catalyst. 19. An atom or group of atoms that has gained or lost one or more electrons and is now either positively or negatively charged A) Isotope. B) Orbital. C) Ion. D) Nucleus. Show Answer Correct Answer: C) Ion. 20. In this equation, CuCl2 + NaOH $\rightarrow$ Cu(OH)2 + NaClWhich product is insoluble? A) Sodium hydroxide. B) Copper(II) chloride. C) Copper(II) hydroxide. D) Sodium chloride. Show Answer Correct Answer: C) Copper(II) hydroxide. 21. For people, the function of cellulose is to promote A) Loss of heat in hot weather. B) Energy production between meals. C) Retention of heat in cold weather. D) Peristalsis. Show Answer Correct Answer: D) Peristalsis. 22. Which of the following has the symbol C? A) Calcium. B) Carbon. C) Copper. D) Chlorine. Show Answer Correct Answer: B) Carbon. 23. Two or more atoms chemically bonded A) Compound. B) Element. C) Molecule. D) Mixture. Show Answer Correct Answer: C) Molecule. 24. The metals of Group 1 are commonly called the A) Alkali Metals. B) Lanthanides. C) Transition metals. D) Alkaline earth metals. Show Answer Correct Answer: A) Alkali Metals. 25. The amount of matter that an object has is its A) Density. B) Mass. C) Substance. D) Volume. Show Answer Correct Answer: B) Mass. 26. Moles of carbon (C) is equal to how many grams? A) 8.0 grams. B) 6.0 grams. C) 14.0 grams. D) 12.0 grams. Show Answer Correct Answer: B) 6.0 grams. 27. What determines the reactivity of an element? A) Number of protons. B) Number of neutrons. C) Number of electrons. D) Number of valence electrons. Show Answer Correct Answer: D) Number of valence electrons. 28. Two or more elements that combine chemically. A) Molecule. B) Mixture. C) Compound. D) None of above. Show Answer Correct Answer: C) Compound. 29. An atom has 23 protons and 29 neutrons. Which is the correct isotope for this atom? A) Vanadium-29. B) Carbon-29. C) Vanadium-52. D) Copper-52. Show Answer Correct Answer: C) Vanadium-52. 30. Which pair of formulas represents two compounds that are electrolytes? A) HCl and CH3OH. B) HCl and KOH. C) C5H12 and KOH. D) C5H12 and CH3OH. Show Answer Correct Answer: B) HCl and KOH. 31. What subatomic particle has a negative charge? A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: C) Electron. 32. A mole of Lithium is ..... to a mole of Carbon. A) Less than. B) Sometimes the same as. C) Greater than. D) Equal to. Show Answer Correct Answer: D) Equal to. 33. A substance that is made up for one type of atom is called an A) Mixture. B) Element. C) Compound. D) Atom. Show Answer Correct Answer: B) Element. 34. The gas used for artificial ripening of green fruit is? A) Ethylene. B) Acetylene. C) Ethane. D) Carbon dioxide. Show Answer Correct Answer: A) Ethylene. 35. It is a number of protons inside the nucleus of an atom. A) Isotopes. B) Atomic mass. C) Atomic number. D) None of above. Show Answer Correct Answer: C) Atomic number. 36. The ability of a metal to allow heat or electricity to pass through it. A) Insulator. B) Conductivity. C) Density. D) Mass. Show Answer Correct Answer: B) Conductivity. 37. Which of the following elements behave chemically both as a metal and a non metal? A) Argon. B) Carbon. C) Boron. D) Mercury. Show Answer Correct Answer: C) Boron. 38. Mass of 2 Moles of H2O is A) 2g. B) 18 g. C) 36g. D) 20 g. Show Answer Correct Answer: C) 36g. 39. Positively charged particles found in the nucleus of an atom A) Neutron. B) Proton. C) Electron. D) None of above. Show Answer Correct Answer: B) Proton. 40. What word describes when a molecule is not attracted to water? A) Hydrophyllic. B) Cohesion. C) Adhesion. D) Hydrophobic. Show Answer Correct Answer: D) Hydrophobic. 41. How many formula units (molecules) are in 1 mole of NaCl? A) 58. B) 11. C) 6.02 x 1023. D) 17. Show Answer Correct Answer: C) 6.02 x 1023. 42. Bleaching action of chlorine is by A) Reduction. B) Decomposition. C) Hydrolysis. D) Oxidation. Show Answer Correct Answer: B) Decomposition. 43. Discovered the Electrons ..... A) Dimitri Mendeleev. B) James Chadwick,. C) JJ Thompson. D) John Dalton. Show Answer Correct Answer: C) JJ Thompson. 44. To get salt out of a solution, we could use ..... A) Decantation. B) Mechanical separation. C) Distillation. D) Filtration. Show Answer Correct Answer: C) Distillation. 45. Rate of chemical reaction means A) Combining reactants with products. B) Concentration of reacting particles. C) Speed of reaction. D) Amount of product formed. Show Answer Correct Answer: C) Speed of reaction. 46. Which pH indicates an alkaline solution? A) 5. B) 10. C) 7. D) 2. Show Answer Correct Answer: B) 10. 47. It cannot be simplied A) Elements. B) Mixture. C) Compound. D) Pure substance. Show Answer Correct Answer: A) Elements. 48. What compound is considered the universal solvent A) Water. B) Salt. C) Ethanol. D) Glucose. Show Answer Correct Answer: A) Water. 49. Which of the following does NOT form a precipitate? A) Ba(NO3)2 (aq) + Na2SO4(aq) $\rightarrow$. B) Ca(NO3)2(aq) + K2CO3(aq) $\rightarrow$. C) LiNO3 (aq) + NaC2H3O2(aq) $\rightarrow$. D) AgNO3(aq) + 2KBr(aq) $\rightarrow$. Show Answer Correct Answer: C) LiNO3 (aq) + NaC2H3O2(aq) $\rightarrow$. 50. The energy of the moving electrons is A) Nuclear energy. B) Radiant energy. C) Heat energy. D) Electrical energy. Show Answer Correct Answer: D) Electrical energy. 51. How is chemical change different from physical change? A) In a physical change a substance is lost. B) In a chemical change does not obey law of conservation of mass. C) In a physical change a new substance is formed. D) In a chemical change a new substance is formed. Show Answer Correct Answer: D) In a chemical change a new substance is formed. 52. What is the precipitate formed when you mix silver nitrate with copper chloride? A) Silver nitrate. B) Copper nitrate. C) Copper chloride. D) Silver chloride. Show Answer Correct Answer: D) Silver chloride. 53. Particles move but stay relatively close to one anther A) Solid. B) Liquid. C) Gas. D) None of above. Show Answer Correct Answer: B) Liquid. 54. An atoms mass number equals the number of A) Protons plus neutrons. B) Protons. C) Protons plus electrons. D) Neutrons. Show Answer Correct Answer: A) Protons plus neutrons. 55. The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind? A) 1/6. B) 1/8. C) 1/4. D) 1/3. Show Answer Correct Answer: B) 1/8. 56. Who is regarded as father of modern chemistry? A) V. Raman. B) Lavoisier. C) Einstein. D) Ruterford. Show Answer Correct Answer: B) Lavoisier. 57. Valence electrons determine an atoms A) Period. B) Electric charge. C) Mass. D) Chemical properties. Show Answer Correct Answer: D) Chemical properties. 58. What is hottest part of the gas flame is called? A) Non-luminous zone. B) Blue zone. C) Luminous zone. D) Dark zone. Show Answer Correct Answer: A) Non-luminous zone. 59. Which subatomic particle would have the greatest potential energy? A) An electron on an outer orbital. B) An electron on an inner orbital. C) A proton in the nucleus. D) A neutron in the nucleus. Show Answer Correct Answer: A) An electron on an outer orbital. 60. Which of the following is not one of the major elements present in the human body? A) Potassium. B) Oxygen. C) Zinc. D) Carbon. Show Answer Correct Answer: C) Zinc. ← PreviousNext →Related QuizzesScience QuizzesGeneral Knowledge 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