This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Chemistry Part I > Class 12 Chemistry (Part I) Chapter 2 Solutions – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 2 Solutions Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A student mixed 10 g of salt in a container of water. The solution was heated on a hot plate to speed evaporation.Which statement describes what will be left in the cup after all the water evaporates from the cup? A) 100g of salt. B) 0g of salt. C) 10g of salt. D) 90g of salt. Show Answer Correct Answer: C) 10g of salt. 2. When one material disperses evenly into another material and the first material disappears ..... A) Dissolves. B) Evaporates. C) Chemical reaction. D) None of the above. Show Answer Correct Answer: A) Dissolves. 3. IN LIQUIDS PARTICLES ARE SLIGHTLY APART A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 4. The pH solution that consist of CH$_{3}$COOH 0.01 M and CH$_{3}$COONa 0.01 M with Ka = 10$^{-5}$ is ..... A) 9. B) 5. C) 6. D) 4. E) 8. Show Answer Correct Answer: B) 5. 5. An equation has one solution if ..... A) The variable is eliminated and we are left with something false (like 2=3). B) The variable is eliminated and we are left with something true (like 2=2). C) We can find the exact value of the variable. D) None of the above. Show Answer Correct Answer: C) We can find the exact value of the variable. 6. A mixture that is evenly mixed. (You can't see the parts) A) Solvent. B) Heterogeneous mixture. C) Concentration. D) Homogeneous mixture. Show Answer Correct Answer: D) Homogeneous mixture. 7. A student places one teaspoon of sugar in a small beaker of water. What will happen to the sugar? A) It will change into water. B) It will dissolve in the water. C) It will melt to form a liquid. D) It will keep all its properties. Show Answer Correct Answer: B) It will dissolve in the water. 8. The temperature at which 10% aqueous solution of (W/V) of glucose will show the osmotic pressure of 16.4 atom is (R = 0.082 L atom K-1 mol-1) A) 300 K. B) 180 K. C) 360$^\circ$C. D) 360 K. Show Answer Correct Answer: D) 360 K. 9. A solution is a special mixture formed when one substance is ..... evenly throughout the other. A) Dissolved. B) Disappearing. C) Put. D) Spread Out. Show Answer Correct Answer: A) Dissolved. 10. A solution containing components A and B follows Raoult's law when A) A-B attraction force is greater than A-A and B-B. B) A-B attraction force is less than A-A and B-B. C) A-B attraction force remains same as A-A and B-B. D) Volume of solution is different from sum of volume of solute and solvent. Show Answer Correct Answer: C) A-B attraction force remains same as A-A and B-B. 11. What is the mass percentage of a solution containing 22g of benzene in 122g of carbon tetrachloride? A) 25%. B) 20%. C) 10%. D) 15%. Show Answer Correct Answer: D) 15%. 12. How many types of solutions are there? A) 5. B) 2. C) 3. D) 4. Show Answer Correct Answer: B) 2. 13. Where in the cell does cell respiration occur? A) Cell membrane. B) Central vacuole. C) Chloroplast. D) Mitochondria. Show Answer Correct Answer: D) Mitochondria. 14. Which of the following will produce crystals if disturbed? A) Unsaturated solutions. B) Colloids. C) Supersaturated solutions. D) Saturated solutions. Show Answer Correct Answer: C) Supersaturated solutions. 15. Higher is the value of K$_{H }$ ..... is the value of solubility of gas in a solvent. A) First increase then decrease. B) Only decreases. C) Higher. D) Lower. Show Answer Correct Answer: D) Lower. 16. ..... system are formed when one system is dispersed in the other system but do not combine to form solution. A) Homogeneous. B) Colloidal. C) Suspension. D) True solution. Show Answer Correct Answer: B) Colloidal. 17. Items in a ..... are easy to pull apart from one another. A) Solution. B) Mixture. C) Chemical change. D) None of the above. Show Answer Correct Answer: B) Mixture. 18. When my statement is never true A) There is no solution. B) There is one solution. C) There is an infinite number of solutions. D) None of the above. Show Answer Correct Answer: A) There is no solution. 19. When a substance dissolves in water, the oxygen atoms in the water molecules orient themselves towards what charge (full or partial) in the solute compound? A) Positive. B) Negative. C) All the above. D) None of the above. Show Answer Correct Answer: A) Positive. 20. The following mixture of solutions that form a buffer solution is ..... A) 50 mL CH$_{3}$COOH 0.2 M and 50 mL NaOH 0.1 M. B) 50 mL CH$_{3}$COOH 0.2 M and 100 mL NaOH 0.1 M. C) 50 mL HCl 0.2 M and 100 mL NH$_{4}$OH 0.1 M. D) 50 mL HCl 0.2 M and 50 mL NH$_{4}$OH 0.1 M. E) 50 mL HCl 0.2 M and 100 mL NaOH 0.1 M. Show Answer Correct Answer: A) 50 mL CH$_{3}$COOH 0.2 M and 50 mL NaOH 0.1 M. 21. According to Henry's law, the solubility of a gas in a liquid is directly proportional to: A) The partial pressure of the gas. B) The temperature of the solution. C) The volume of the solvent. D) The mole fraction of the solute. Show Answer Correct Answer: A) The partial pressure of the gas. 22. How many solutions does this equation have?28a-4 = 28a-4 A) One Solution. B) No Solution. C) Many Solutions. D) None of the above. Show Answer Correct Answer: C) Many Solutions. 23. All of the following describes a solution EXCEPT ..... A) Can be separated by physical means. B) Clear. C) Homogeneous. D) Cannot pass through filter paper. Show Answer Correct Answer: B) Clear. 24. -3(x + 6) =-3(2x + 4) A) No Solution. B) One Solution. C) Infinite Solution. D) None of the above. Show Answer Correct Answer: B) One Solution. 25. A substance that dissolves in water and conducts electricity: A) Electrolyte. B) Non-electrolyte. C) A solvent. D) None of the above. Show Answer Correct Answer: A) Electrolyte. 26. In an experiment, a student adds sugar to a cup of tea and stirs it. What is the role of sugar in this solution? A) Precipitate. B) Catalyst. C) Solute. D) Solvent. Show Answer Correct Answer: C) Solute. 27. Polar molecules tend to dissolve ..... molecules A) Polar. B) Non-polar. C) All molecular compounds. D) All ionic compounds. Show Answer Correct Answer: A) Polar. 28. When a Koolaid mix in water is dark in color and very sweet it is a ..... solution. A) Concentrated. B) Diluted. C) All the above. D) None of the above. Show Answer Correct Answer: A) Concentrated. 29. The amount of space in an object. A) Density. B) Volume. C) Saturation. D) None of the above. Show Answer Correct Answer: B) Volume. 30. How do we get mass from moles? A) Multiply by molar mass. B) Divide by molar mass. C) Multiply by avogadro's number. D) Divide by avogadro's number. Show Answer Correct Answer: A) Multiply by molar mass. 31. How would you separate a mixture of sand and salt? A) Mix them with water and let the water evaporate. B) Mix them with water, pour the mixture through a sieve, then let the water evaporate. C) Heat the sand and salt mixture for 5 minutes, then let it cool. D) I would not do any of these because none of these options would work. Show Answer Correct Answer: B) Mix them with water, pour the mixture through a sieve, then let the water evaporate. 32. Solutions in which electric currents cannot run through are said to be A) Noncolloidal. B) Electrolytes. C) Nonelectrolytes. D) Conductors. Show Answer Correct Answer: C) Nonelectrolytes. 33. Which of the following is dilute? A) 10 g of sugar in 10g of water. B) 20 g of sugar in 10 g of water. C) 20g of sugar in 20 g of water. D) 10 g of sugar in 20 g of water. Show Answer Correct Answer: D) 10 g of sugar in 20 g of water. 34. What type of compound is more likely to be an electrolyte? A) Covalent compound. B) Ionic compound. C) Metallic compound. D) Molecular compound. Show Answer Correct Answer: B) Ionic compound. 35. In comparison to a 0.01 M solution of glucose, the depression in freezing pointof a 0.01 M MgCl2 solution is ..... A) About twice. B) About three times. C) The same. D) About six times. Show Answer Correct Answer: B) About three times. 36. Which of the following is an example of a solution? A) Cooked flour. B) Marshmallow. C) Sea water. D) Blood. Show Answer Correct Answer: C) Sea water. 37. Soup has ingredients in it that dissolve. True or False A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 38. I broke my mom's cell phone and had to buy her a new one. The red part of the sentence is the A) Problem. B) Solution. C) All the above. D) None of the above. Show Answer Correct Answer: A) Problem. 39. -2(3m + 6) =-3(4 +2m) A) No Solution. B) One Solution. C) Infinite Solution. D) None of the above. Show Answer Correct Answer: C) Infinite Solution. 40. Which of the following will conduct electricity when dissolved to make a solution? A) KCl. B) C$_{12}$H$_{22}$O$_{11}$. C) CO$_{2}$. D) NH$_{3}$. Show Answer Correct Answer: A) KCl. 41. What happens to the solubility of a typical solid solute as temperature increases? A) The solubility remains the same. B) There is no way to know without knowing which exact solute. C) The solubility increases. D) The solubility decreases. Show Answer Correct Answer: C) The solubility increases. 42. Write dissociation equations for the following electrolytes. Show physical states of all species involved!ZnCl$_{2}$ A) ZnCl$_{2(s)}$ $\rightarrow$ Zn$^{+}$$_{(aq) }$+ Cl$^{-}$$_{(aq)}$. B) ZnCl$_{2(s)}$ $\rightarrow$ Zn$^{2+}$$_{(aq) }$+ 2Cl$^{-}$$_{(aq)}$. C) ZnCl$_{2(s)}$ $\rightarrow$ Zn$^{+}$$_{(aq) }$+ 2Cl$^{-}$$_{(aq)}$. D) ZnCl$_{2(s)}$ $\rightarrow$ Zn$^{2+}$$_{(aq) }$+ Cl$^{-}$$_{(aq)}$. Show Answer Correct Answer: B) ZnCl$_{2(s)}$ $\rightarrow$ Zn$^{2+}$$_{(aq) }$+ 2Cl$^{-}$$_{(aq)}$. 43. Solve for x:4(1-x)+3x=-2(x+1) A) X =-6. B) X = 6. C) X = 3. D) None of the above. Show Answer Correct Answer: A) X =-6. 44. Deirdre found that a linear equation with one variable (the variable x) can be transformed into an equivalent equation. x = 5Determine if the equation has:one solution, no solutions, or infinitely many solutions. A) Infinitely Many Solutions. B) One Solution. C) No Solution. D) None of the above. Show Answer Correct Answer: B) One Solution. 45. What process results from the spreading of sugar particles throughout water? A) Distributing. B) Dissolving. C) Mixing. D) Melting. Show Answer Correct Answer: B) Dissolving. 46. How well two or more substances mix together A) Solvent. B) Solution. C) Mixture. D) Miscibility. Show Answer Correct Answer: D) Miscibility. 47. What do solutions that conduct electricity contain that differentiates them fromsolutions that do not conduct electricity? A) Solutes. B) Molecules. C) Free-moving ions. D) Atoms. Show Answer Correct Answer: C) Free-moving ions. 48. What is the molality of a solution in which 3.0 moles of NaCl is dissolved in 1.5 Kg of water? A) 2.0 M. B) 0.22 m. C) 2.0m. D) 135 m. Show Answer Correct Answer: C) 2.0m. 49. What a character has to face in a story or text (an issue) is called a ..... A) Solution. B) Problem. C) All the above. D) None of the above. Show Answer Correct Answer: B) Problem. 50. The substance being dissolved in a solution is called the- A) Not here. B) Solute. C) Solvent. D) Variable. Show Answer Correct Answer: B) Solute. 51. You can make a solution more concentrated by adding ..... A) Solute. B) Solvent. C) Water. D) None of the above. Show Answer Correct Answer: A) Solute. 52. The universal solvent is ..... A) Acid. B) Water. C) Sodium. D) Wind. Show Answer Correct Answer: B) Water. 53. On dissolving sugar in water at room temperature solution feels cool to touch. Under which of the following cases dissolution of sugar will be most rapid? A) Sugar crystals in hot water. B) Powdered sugar in hot water. C) Sugar crystals in cold water. D) Powdered sugar in cold water. Show Answer Correct Answer: B) Powdered sugar in hot water. 54. During our investigation, we separated dry materials like salt, gravel and powder. What tool did we use to separate the largest materials? A) Magnet. B) Filter paper. C) Screen. D) Water. Show Answer Correct Answer: C) Screen. 55. Which of the following is soluble inwater? A) Candle wax (non-polar). B) Cooking oil (non-polar). C) Baking soda (polar). D) Silver metal (non-polar). Show Answer Correct Answer: C) Baking soda (polar). 56. In which solution can there be the most solute? A) Solvent is 15 degrees, solute is a solid. B) Solvent is 30 degrees, solute is a solid. C) Solvent is 100 degrees, solute is a gas. D) Solvent is 100 degrees, solute is a solid. Show Answer Correct Answer: D) Solvent is 100 degrees, solute is a solid. 57. What tool can you use to separate a mixture of sand and water? A) Hands. B) Filter. C) Tweezers. D) Craft stick. Show Answer Correct Answer: B) Filter. 58. The process of evenly mixing one substance into another forming a solution is ..... process A) Condensation. B) Heating. C) Dissolving. D) Concentration. Show Answer Correct Answer: C) Dissolving. 59. A dilute salt-solution will ..... A) Be heavier. B) Have a darker color. C) Taste sweeter. D) Have less solid. Show Answer Correct Answer: D) Have less solid. 60. An insoluble substance A) Coffee. B) Salt. C) Sugar. D) Wax. Show Answer Correct Answer: D) Wax. 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