Chemistry_Class-12_Ch-1_Solution_Topic-1_Solubility And Henry's Law 1 / 24 1. The solubility of a gas in water depends on A) Nature of the gas B) Temperature C) Pressure of the gas. D) All of the above 2 / 24 2. The statement " The mass of a gas dissolved in a given mass of a solvent at any temperature is proportional to the pressure of the gas above the solvent" is A) Dalton's Law of Partial Pressures B) Law of Mass Action C) Henry's Law D) None of these 3 / 24 3. Which one of the following statements regarding Henry's law is not correct A) 3. Which one of the following statements regarding Henry's law is not correct B) The value of Kₕ increases with increase of temperature and Kₕ is function of the nature of the gas C) The partial pressure of the gas in vapour phase is proportional to the mole fraction of the gas in the solution D) Higher the value of Kₕ at a given pressure, higher is the solubility of the gas in the liquids 4 / 24 4. Out of following which one is not an example of a solution A) Air B) Amalgam C) Brass D) Benzene in water 5 / 24 5. Henry's law constants for aqueous solution of CO, O₂, CO₂ and C₂H₂ gases are respectively at 25ºC as 58 × 10³, 43 × 10³, 1.61 × 10³ and 1.34 × 10³. The solubility of these gases decreases in the order A) CO > O₂ > CO₂ > C₂H₂ B) O₂ > CO₂ > CO > C₂H₂ C) C₂H₂ > CO₂ > O₂ > CO D) O₂ > CO₂ > C₂H₂ > CO 6 / 24 6. When a crystal of the solute is introduced saturated solution of the solute into a super Saturated solution A) The solute dissolves B) The excess solutes crystallizes out C) The solution becomes unsaturated D) The solution becomes unsaturated 7 / 24 7. Which of the following units is useful in relating concentration of solution with its vapour pressure A) Mole fraction B) Parts per million C) Mass percentage D) Molality 8 / 24 8. 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 cold water B) Sugar crystals in hot water C) Powdered sugar in cold water D) Powdered sugar in hot water 9 / 24 9 . Value of Henry's constant Kₕ ......... A) Increases with increase in temperature B) Decreases with increase in temperature C) Remains constant D) First increases then decreases 10 / 24 10. The value of Henry's constant, Kₕ is A) Greater for gases with higher solubility B) Greater for gases with lower solubility C) Constant for all gases D) Not related to the solubility of gases 11 / 24 11. KH value for Ar(g), CO2(g), HCHO(g) and CH4(g) are 40.39, 1.67, 1.83×10−5 and 0.413 respectively Arrange these gases in the order of their increasing solubility A) HCHO<CH 4 <CO 2 <Ar B)HCHO<CO 2 <CH 4 <Ar C) Ar<CO 2 <CH 4 <HCHO D) Ar<CH 4 <CO 2 <HCHO 12 / 24 12. The Henry's law constant for the solubility of N₂ gas in water at 298 K is 1.0×105 atm. The mole fraction of N₂ in air is 0.8. The number of moles of N₂ from air dissolved in 10 moles of water at 298 K and 5 atm pressure is A) 4.0 × 10⁻⁴ B) 4.0 × 10⁻⁵ C) 5.0 × 10⁴ D) 4.0 × 10⁻⁶ 13 / 24 13. Which among the following gas will greatly deviate from Henry's law in water A) H₂ B) N₂ C) Ar D) CO₂ 14 / 24 14. Normal human blood sugar range is 65-105 mg /dl. Considering density of human blood is 1.06 kg/L, if a patient's sugar level reads 720 ppm, his/her blood sugar at that time is A) Normal B) High C) Low D) Cannot say 15 / 24 15. When a gas is bubbled through water at 298 K, a very dilute solution of the gas is obtained. Henry's law constant for the gas at 298 K is 100 kbar. If the gas exerts a partial pressure of 1 bar, the number of millimoles of the gas dissolved in one litre of water is A) 0.555 B) 0.0555 C) 5.55 D) 55.5 16 / 24 16. At equilibrium, the rate of dissolution of a solid solute in a volatile liquid solvent is..... A) Less than the rate of crystallisation B) Greater than the rate of crystallisation C) Equal to the rate of crystallisation D) Zero 17 / 24 17. A beaker contains a solution of substance 'A'. Precipitation of substance 'A' takes place when small amount of 'A’ is added to the solution. The solution Is..... A) Saturated B) Supersaturated C) Unsaturated D) Concentrated 18 / 24 18. Maximum amount of a solid solute that can be dissolved in a specified amount of a given liquid solvent does not depend upon....... A) Temperature B) Nature of solute C) Pressure D) Nature of solvent 19 / 24 19. Which of the following is not correct for D₂O A) Boiling point is higher than H₂O B) D₂O reacts slowly than H₂O C) Viscosity is higher than H₂O at 25° D) Solubility of NaCl in it is more than H₂O 20 / 24 20. Which one of the following gases has the lowest value of Henry's law constant A) N₂ B) He C) H₂ D) CO₂ 21 / 24 21. Least soluble gas in water will is A) He b) O₂ C) NH₃ D) CO₂ 22 / 24 22. . The solubility curve of KNO3 in water is shown below . The amount of KNO3, that dissolves in 50g of water at 40°C is closest to A) 100g B) 150g C) 200g D) 50g 23 / 24 23)The variation of solubility of four different gases (G1, G2, etc.) in a given solvent with pressure at a constant temperature is shown in the plot. A) G4 B) G3 C) G2 D) G1 24 / 24 24) For the solution of the gases w, x, y and z in water at 298K, the Henry’s law constants (KH) are 0.5, 2, 35 and 40k bar, respectively. The correct plot for the given data is A) B) C) D_ Your score isThe average score is 7% 0% Exit
