This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Chemistry Part I > Class 12 Chemistry (Part I) Chapter 2 Solutions – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 2 Solutions Quiz 15 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In a chemistry class, King prepared a solution by mixing 25 g of sugar in 80 g of water. What are the concentrations of the solute and solvent in percent (%) by mass? A) Solute:34%, Solvent:66%. B) Solute:44%, Solvent:56%. C) Solute:14%, Solvent:86%. D) Solute:24%, Solvent:76%. Show Answer Correct Answer: D) Solute:24%, Solvent:76%. 2. Which of the following does not affect solubility of solutes? A) Tempearture. B) Color. C) Size particles. D) Kind of solute. Show Answer Correct Answer: B) Color. 3. Which salt below has the largest effect on freezing point? A) LiBr. B) C$_{2}$H$_{4}$O$_{2}$. C) CaF$_{2}$. D) H$_{2}$S. Show Answer Correct Answer: C) CaF$_{2}$. 4. What takes place when a solid changes to a liquid? A) Condensation. B) Freezing. C) Melting. D) Evaporation. Show Answer Correct Answer: C) Melting. 5. What is the difference between concentration and saturation? A) Concentration is a fixed % and saturation refers to amount of solute dissolved. B) Concentration refers to amount of solute dissolved and saturation is a fixed %. C) Nothing. D) All of the above. Show Answer Correct Answer: A) Concentration is a fixed % and saturation refers to amount of solute dissolved. 6. When carbon dioxide gas dissolves in water to make soda carbonated, what is the solute of this solution? A) Water. B) Carbon dioxide gas. C) Soda mixture. D) None of the above. Show Answer Correct Answer: B) Carbon dioxide gas. 7. What statements CAN BE TRUE about basic buffer?(you may choose more than one answer) A) Basic buffer usually works effectively at pH range of above 7. B) It's made of a mixture of strong base and salt of its conjugate acid. C) Adding small amount of strong acid to the solution of basic buffer can significantly alter the pH of the buffer solution. D) Diluting solution of basic buffer cause pH of that solution to change drastically. Show Answer Correct Answer: A) Basic buffer usually works effectively at pH range of above 7. 8. The freezing point of a solution is ..... the freezing point of the pure solvent. A) The same as. B) Lower than. C) No relation to. D) Higher than. Show Answer Correct Answer: B) Lower than. 9. Which is an example of a mixture? A) A salad. B) An orange. C) Sand. D) Nuts. Show Answer Correct Answer: A) A salad. 10. If your final answer is x = x A) One Solution. B) No Solution. C) Infinite Many Solutions. D) None of the above. Show Answer Correct Answer: C) Infinite Many Solutions. 11. To dilute something means to A) Make it more concentrated by removing something else. B) Make it more diluted by adding something else. C) Make it less concentrated or strong by adding something else. D) Keep it at the same concentration without adding anything else. Show Answer Correct Answer: C) Make it less concentrated or strong by adding something else. 12. Containing the maximum amount of a solute A) Mixture. B) Dilute. C) Physical change. D) Saturate. Show Answer Correct Answer: D) Saturate. 13. What is density? A) The amount of space an object takes up. B) Measurement of the pull of gravity on an object. C) The amount of matter in an object. D) Measure of how tightly packed the molecules are in a substance. Show Answer Correct Answer: D) Measure of how tightly packed the molecules are in a substance. 14. What is the [OH-] if the pH is 4.9? (Hint:First find pOH. Then find [OH-].) A) 4.9 x 10-10 M. B) 7.94 x 10-14 M. C) 1.0 x 10-4 M. D) 7.94 x 10-10 M. Show Answer Correct Answer: D) 7.94 x 10-10 M. 15. What is the concentration, in percent by volume, of 15.3 mL of solute in 2.65 L of solution? A) 0.58%. B) 0.0058%. C) 5.8%. D) None of the above. Show Answer Correct Answer: A) 0.58%. 16. Which change occurs when lemon juice is mixed with water? A) The mass of the lemon juice decreases. B) The water becomes a solid. C) The lemon juice dissolves and spreads out evenly in the water. D) The volume of the water decreases. Show Answer Correct Answer: C) The lemon juice dissolves and spreads out evenly in the water. 17. Which of the following factors does NOT affect the rate at which a solute dissolves in a solvent? A) Color of the solute. B) Particle size. C) Temperature. D) Stirring. Show Answer Correct Answer: A) Color of the solute. 18. A substance that is not a good conductor of electricity when in solution. A) Solution. B) Nonelectrolyte. C) Suspension. D) Colloid. Show Answer Correct Answer: B) Nonelectrolyte. 19. When a substance dissolves in water, we say that this substance is: A) Insoluble. B) Only ionic. C) Soluble. D) None of the above. Show Answer Correct Answer: C) Soluble. 20. The cell membrane main purpose is ..... A) Locomotive. B) Energy Production. C) Looking good. D) Selective Permeability. Show Answer Correct Answer: D) Selective Permeability. 21. This is a type of mixture where one substance dissolves into another A) Compound. B) Solution. C) Solubility. D) Miscibility. Show Answer Correct Answer: B) Solution. 22. Substances that dissolve are A) Insoluble. B) Soluble. C) Impermeable. D) Solid. Show Answer Correct Answer: B) Soluble. 23. A soluble substance: A) Will not dissolve in water. B) Will dissolve in water. C) Is only an electrolyte. D) None of the above. Show Answer Correct Answer: B) Will dissolve in water. 24. What is the complete ionic equation for the following chemical equation?BaCl2(aq) + Na2SO4(aq) $\rightarrow$ BaSO4(s) + 2NaCl(aq) A) Ba2+(aq) + SO42-(aq) $\rightarrow$ BaSO4(s). B) BaCl2(aq) + 2Na+(aq) + SO42-(aq) $\rightarrow$ 2Na+(aq) + 2Cl-(aq) + BaSO4(s). C) Ba2+(aq) + Cl-(aq) + Na+(aq) + SO42-(aq) $\rightarrow$ Na+(aq) + Cl-(aq) + BaSO4(s). D) Ba2+(aq) + 2Cl-(aq) + 2Na+(aq) + SO42-(aq) $\rightarrow$ 2Na+(aq) + 2Cl-(aq) + BaSO4(s). Show Answer Correct Answer: D) Ba2+(aq) + 2Cl-(aq) + 2Na+(aq) + SO42-(aq) $\rightarrow$ 2Na+(aq) + 2Cl-(aq) + BaSO4(s). 25. Which material is soluble? A) Sand. B) Iron filings. C) Sugar. D) Spaghetti. Show Answer Correct Answer: C) Sugar. 26. Which mixture that forms maximum boiling azeotropes: A) Water and Nitric acid. B) Ethanol and Water. C) Acetone and Carbon disulphide. D) Heptane and Octane. Show Answer Correct Answer: A) Water and Nitric acid. 27. To find the amount of A) Separate. B) Combine. C) Solvent. D) Measure. Show Answer Correct Answer: D) Measure. 28. The number of components in a binarysolution is ..... A) 3. B) 2. C) 5. D) 4. Show Answer Correct Answer: B) 2. 29. Which of the following will produce ions to conduct electricity when dissolved in water? A) CH$_{4}$. B) P$_{2}$O$_{5}$. C) NH$_{3}$. D) CaCl$_{2}$. Show Answer Correct Answer: D) CaCl$_{2}$. 30. Which tool were we able to use to separate the powder during the investigation? A) Screen. B) Filter paper. C) Magnet. D) None of the above. Show Answer Correct Answer: B) Filter paper. 31. What happens to molecules when the temperature drops or lowers? A) The molecules get closer together. B) The molecules start moving faster. C) The molecules stop moving. D) The molecules become smaller. Show Answer Correct Answer: A) The molecules get closer together. 32. Write an example of heterogeneous solution A) Sugar in oil. B) Sand in water. C) Oil in water. D) Blood in water. Show Answer Correct Answer: B) Sand in water. 33. To separate a solution of salt and water what separation tool/method is used? A) Magnet. B) Evaporation. C) Screen. D) Filter. Show Answer Correct Answer: B) Evaporation. 34. What is the concentration of a 500 mL solution with 2.5 mol of sodium chloride? A) 1, 250 M. B) 0.005 M. C) 5 M. D) 0.2 M. Show Answer Correct Answer: C) 5 M. 35. Brass is an alloy made of A) Copper and zinc. B) Copper and tin. C) Copper and nickel. D) Copper and aluminum. Show Answer Correct Answer: A) Copper and zinc. 36. The teacher seemed to materialize out of thin air when the girls were about to fight. Had they seen her, they may have walked away and avoided a referral. Which of the following is an antonym for materialize? A) Appear. B) Shrink. C) Vanish. D) Approach. Show Answer Correct Answer: C) Vanish. 37. Solutions are homogeneous mixtures of two or more than two components. True or false? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 38. What are the factors that can affect the solubility of the substance? A) Particle size, temperature, and pressure. B) Particle size, temperature, and stirring or shaking. C) Particle size, temperature, color of substance. D) None of the above. Show Answer Correct Answer: B) Particle size, temperature, and stirring or shaking. 39. A tube that moves liquid out of a container by gravity. A) Siphon. B) Product. C) Straw. D) None of the above. Show Answer Correct Answer: A) Siphon. 40. A non-electrolyte is composed of ..... in solution A) Molecules. B) Molecules and ions. C) Ions. D) None of the above. Show Answer Correct Answer: A) Molecules. 41. Which of the following is a method of separating solutions? (Think of salt water) A) Hand seperation. B) Filtering. C) Screening. D) Evaporation. Show Answer Correct Answer: D) Evaporation. 42. In a solution, the solute is the substance that A) Is the liquid. B) Dissolves in the solvent. C) Is the solid. D) Is in the greatest quantity. Show Answer Correct Answer: B) Dissolves in the solvent. 43. Which of the following pairs form a maximum boiling azeotrope? A) Ethanol and water. B) Benzene and toluene. C) Nitric acid and water. D) Methanol and acetone. Show Answer Correct Answer: A) Ethanol and water. 44. Gaseous solutes are ..... soluble in a solvent when the solvent's temperature increases. A) More. B) Less. C) Just as (no change). D) None of the above. Show Answer Correct Answer: B) Less. 45. 6x + 9-x = 3x + 9 + x A) No Solution. B) One Solution. C) Infinite Solutions. D) None of the above. Show Answer Correct Answer: B) One Solution. 46. A student mixes 35 grams of salt in 100 milliliters of water. How would the student make the solution MORE concentrated? A) Add 20 g salt and 20 ml water. B) Add 20 g salt. C) Pour some of the solution out. D) Add 20 ml water. Show Answer Correct Answer: B) Add 20 g salt. 47. The chemical property of water that allows it to dissolve substances with positive and negative charges. A) Evaporation. B) Surface Tension. C) Solubility. D) Polarity. Show Answer Correct Answer: D) Polarity. 48. In a solution, what is the solute? A) The substance(s) that exists in smaller quantities. B) The substance that exists in the greatest quantity. C) The mixing of different substances. D) The process in which neutral molecules lose or gain electrons. Show Answer Correct Answer: A) The substance(s) that exists in smaller quantities. 49. The parts of a solution are the A) Salt and vapor. B) Solvent and solid. C) Solute and water. D) Solvent and solute. Show Answer Correct Answer: D) Solvent and solute. 50. Mustard oil is an example of- A) SOLID that is insoluble in water. B) LIQUID that is insoluble in water. C) GASES that is insoluble in water. D) None of the above. Show Answer Correct Answer: B) LIQUID that is insoluble in water. 51. How many solutions does this equation have?6b-4 = 6b + 4 A) One Solution. B) No Solution. C) Many Solutions. D) None of the above. Show Answer Correct Answer: B) No Solution. 52. When no more solute dissolves the solution is ..... A) Saturated. B) Supersaturated. C) Unsaturated. D) Supercalifragilisticexpialidocious. Show Answer Correct Answer: A) Saturated. 53. If your final answer is 0 =-5 A) Infinite Many Solutions. B) One Solution. C) More steps to reach final step. D) No Solution. Show Answer Correct Answer: D) No Solution. 54. How do gasses dissolve differently than solids? A) Solids dissolve more in higher pressure. B) Gasses can dissolve more with lower temperatures. C) Gasses can dissolve more in higher temperatures. D) Gasses dissolve more in lower pressure. Show Answer Correct Answer: B) Gasses can dissolve more with lower temperatures. 55. One way to separate out a heterogeneous mixture is to boil it. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 56. Which of the following are considered to be heterogeneous mixtures? A) Colloid. B) Solution. C) Suspension. D) Both Orange and Blue are right. Show Answer Correct Answer: D) Both Orange and Blue are right. 57. Elevation in the boiling point for 1 molal solution of glucose is 2K. The depression in the freezing point of 2 molal solution of glucose in the same solvent is 2 K. The relation between K$_{b }$and K$_{f }$is: A) K$_{b}$ = K$_{f}$. B) K$_{b}$ = 1.5 K$_{f}$. C) K$_{b}$ = 2 K$_{f}$. D) K$_{b}$ = 0.5 K$_{f}$. Show Answer Correct Answer: C) K$_{b}$ = 2 K$_{f}$. 58. ML of water is placed in a beaker, 10 grams of a salt in placed in the water and stirred. All the salt dissolves. The solvent is: A) The water. B) The mass of the salt. C) The beaker. D) The salt. Show Answer Correct Answer: A) The water. 59. A solute that contains polar molecules will dissolve in a solvent that contains A) Covalent molecules. B) Polar molecules. C) Equal-sized molecules. D) Nonpolar molecules. Show Answer Correct Answer: B) Polar molecules. 60. What do you mean by the term concentration A) Total amount of solution. B) It is the amount of solute particles present in a solution. C) Total amount of solvent. D) It is the amount of solvent particles present in the solution. Show Answer Correct Answer: B) It is the amount of solute particles present in a solution. ← PreviousNext →Related QuizzesScience QuizzesClass 12 QuizzesClass 12 Chemistry (Part I) Chapter 2 Solutions Quiz 1Class 12 Chemistry (Part I) Chapter 2 Solutions Quiz 2Class 12 Chemistry (Part I) Chapter 2 Solutions Quiz 3Class 12 Chemistry (Part I) Chapter 2 Solutions Quiz 4Class 12 Chemistry (Part I) Chapter 2 Solutions Quiz 5Class 12 Chemistry (Part I) Chapter 2 Solutions Quiz 6Class 12 Chemistry (Part I) Chapter 2 Solutions Quiz 7Class 12 Chemistry (Part I) Chapter 2 Solutions Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books