InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the molarity of HCl in a solution prepared by dissolving 5.5 g HCl in 200 g ethanol if the density of the solution is 0.79 `g mL^(-1)`?A. 21 MB. `0.58 M`C. `6 xx 10^(-4) M`D. 1.7 M |
| Answer» Correct Answer - B | |
| 2. |
Semipermeable membrane is that which permits the passage of :A. solute molecules onlyB. solvent molecules onlyC. solvent and solute molecules bothD. neither solute nor solvent molecules |
| Answer» Correct Answer - B | |
| 3. |
Pure benzne freezes at `5.3^(@)C`. A solution of 0.223g of phenyl acetic acid `(C_(6)H_(5)CH_(2)COOH)` in 4.4g of benzene `(K_(f)=5.12 "K kg mol"^(-1))` freezes at `4.47^(@)C`. From the observation one can conclude that :A. phenyl acetic acid exists as such in benzeneB. phenyl acetic acid undergoes partial ionization in benzeneC. phenyl acetic acid undergoes complete ionization in benzeneD. phenyl acetic acid dimerizes in benzene |
| Answer» Correct Answer - D | |
| 4. |
The movement of solvent molecules from higher concentration to lower concentration through semipermeable membrane under pressure is termed :A. osmosisB. reverse osmosisC. dialysisD. diffusion |
| Answer» Correct Answer - B | |
| 5. |
The order of osmotic prssure of equimolar solutions of `BaCl_(2),NaCl` and glucose will be:A. glucose `gt` NaCl `gt BaCl_(2)`B. `BaCl_(2) gt` NaCl `gt` glucoseC. NaCl `gt BaCl_(2) gt` glucoseD. NaCl `gt` glucose `gt BaCl_(2)` |
| Answer» Correct Answer - B | |
| 6. |
(A) : Molarity of 0.02 N solution of `HNO_(3)` is 0.02 M (R) : Molarity and normality of a soltuion are never equal.A. If both (A) and (R) are correct and (R) is the correct explanation for (A)B. If both (A) and (R) are correct but (R) is not correct explanation for (A)C. If (A) is correct but (R) is incorrectD. If (A) is incorrect but (R) is correct |
| Answer» Correct Answer - C | |
| 7. |
`K_(2)HgI_(4)` is `50%` ionised in aqueous solution. Which of the following are correct ?A. `n=7`B. `n=3`C. `i=2`D. `i=4` |
| Answer» Correct Answer - B::C | |
| 8. |
The decrease in freezing point of an aqueous solution of a substance is 1.395 K and that in the freezing point of a benzene solution of the same substance is 1.28 K. The substance :A. dissociates in aqueous solution as well as in the benzene solutionB. forms complexes in the solutionC. associates in the benzenem solutionD. dissociates in the aqueous solution and not in the benzene solution |
| Answer» Correct Answer - C::D | |
| 9. |
Consider 0.1 M solutions of two solutes X and Y. The solute X behaves as univalent electrolyte, while the solute Y dimerises in solution. Select correct statement(s) regarding these solutions:A. 1,2,3B. 2,3,4C. 1,2,4D. 1,3,4 |
| Answer» Correct Answer - A | |
| 10. |
Which solution will exert highest osmotic pressure ?A. 1 M glucose solutionB. 1 M urea solutionC. 1 M alum solutionD. 1 M NaCl solution |
| Answer» Correct Answer - C | |
| 11. |
The vapour pressure of pure liquid solvent `A` is `0.80 atm`. When a non-volatile substance `B` is added to the solvent, its vapour pressure drops to `0.60 atm`, the mole fraction of component `B` in the solution isA. 0.25B. `0.50`C. 0.75D. `0.90` |
| Answer» Correct Answer - A | |
| 12. |
Each question contains STATEMENT-I(Assertion) and STATEMENT-2(Reason).the statement carefully and mark the correct answer accoring to the instrution given below: STATEMENT - 1 : An increase in surface area increases the rate of evaporation. STATEMENT - 2 : Stronger the intermolecular attaction force, faster is the rate of evaporation at a given temperature.A. If both (A) and (R) are correct and (R) is the correct explanation for (A)B. If both (A) and (R) are correct but (R) is not correct explanation for (A)C. If (A) is correct but (R) is incorrectD. If (A) is incorrect but (R) is correct |
| Answer» Correct Answer - C | |
| 13. |
Each question contains STATEMENT-I(Assertion) and STATEMENT-2(Reason).the statement carefully and mark the correct answer accoring to the instrution given below: STATEMENT - 1 : Elevation in boiling point will be high if the molal elevation constant of the liquid is high. STATEMENT - 2 : Elevation in boiling point is a colligative property.A. Statement-1 is true , statement-2 is true , statement-2 is a correct explanation for statement-3B. Statement-1 is true , statement-2 is true , statement-2 is not a correct explanation for statement-3C. Statement-1 is true , statement-2 is falseD. Statement-1 is false , statement-2 is true |
| Answer» Correct Answer - B | |
| 14. |
Which of the following is/are influenced by the temperature ?A. Freezing pointB. Boiling pointC. Vapour pressureD. Osmotic pressure |
| Answer» Correct Answer - C::D | |
| 15. |
Statement-1 : The vapour pressure of 0.1 M `Hg_(2)Cl_(2)` is equal to 0.1 M `AlCl_(3)` solution Statement-2 : 0.1 `AlCl_(3)` and 0.1 `Hg_(2)Cl_(2)` give different numbers of ions in a solution.A. Statement-1 is true , statement-2 is true , statement-2 is a correct explanation for statement-2B. Statement-1 is true , statement-2 is true , statement-2 is not a correct explanation for statement-2C. Statement-1 is true , statement-2 is falseD. Statement-1 is false , statement-2 is true |
| Answer» Correct Answer - D | |
| 16. |
Statement-1 : Solubility of ionic compounds in water depends on both the lattice energy and the hydration energy. Statement-2 : Ionic compounds dissolve in water when their hydration energy exceeds the lattice energy.A. Statement-1 is true , statement-2 is true , statement-2 is a correct explanation for statement-1B. Statement-1 is true , statement-2 is true , statement-2 is not a correct explanation for statement-1C. Statement-1 is true , statement-2 is falseD. Statement-1 is false , statement-2 is true |
| Answer» Correct Answer - A | |
| 17. |
Consider the follwing vapour pressure composition graph. `SP` is equal to: a. `PQ + RS`m , b. `PQ + QR` , c. `SR + SQ` , d. PQ + QR + RS A. `PQ + RS`B. `PQ + QR + RS`C. `SR + SQ`D. `PQ + QR` |
| Answer» Correct Answer - C | |
| 18. |
The given graph indicates : A. (+) deviationB. (-) deviationC. no deviationD. none of these |
| Answer» Correct Answer - A | |
| 19. |
Match the following graph : A (i) (+) deviation B (ii) Ideal ltbvrgt C (iii)(-) deviation.A. (A) (i),(B) (ii), (C) (iii)B. (A) (iiii), (B) (ii), (C) (i)C. (A) (ii), (B) (iii), (C) (i)D. none of the above |
| Answer» Correct Answer - B | |
| 20. |
If 18 g of glucose is present in 1000 g of solvent, the solution is said to beA. 1 molarB. 0.1 molarC. 0.5 molalD. 0.1 molal |
| Answer» Correct Answer - D | |
| 21. |
(A) : One molar solution is always more concentrated than one molal solution (R) : The amount of solvent in 1 M and 1m aqueous solution is not equal.A. If both (A) and (R) are correct and (R) is the correct explanation for (A)B. If both (A) and (R) are correct but (R) is not correct explanation for (A)C. If (A) is correct but (R) is incorrectD. If (A) is incorrect but (R) is correct |
| Answer» Correct Answer - D | |
| 22. |
Cryoscopy is concerned with :A. osmotic pressure of a solutionB. elevation of boiling point of a solutionC. depression in freezing point of a solutionD. relative lowering in vapour pressure of a solution |
| Answer» Correct Answer - C | |
| 23. |
Solubility of a gas in a liquid solvent increases withA. increase in temperatureB. reduction of gas pressureC. decrease in temperature and increase of gas pressureD. amount of liquid taken |
| Answer» Correct Answer - C | |
| 24. |
The boiling point elevation and freezing point depression of solutions have a number of partical applications. Ethylene glycol `(CH_(2)OH-CH_(2)OH)` is used in automobile radiatiors as an antifreeze because it lowers the freezing point of the coolant. The same substance also helps to prevent the radiator coolant from boiling away by elevating the boiling point. Ethylene glycol has low vapour pressure. We can also use glycerol as an antifreeze. In order for the boiling point elevation to occur, the solute must be non-volatile, but no such restriction applies to freezing point depression. For example, methanol `(CH_(3)OH)`, a fairly volatile liquid that boils only at `65^(@)C`, is sometimes used as an antifreeze in automobile radiators. `124 g` each of the two reagents glycol and glycerol are added in `5 kg` of water of the radiators in two cars. Which of the following statements is wrong?A. Both will act as antifreezeB. Glycol will be betterC. Glycerol is better because its molar mass is greater than glycolD. Glycol is more volatile than glycerol |
| Answer» Correct Answer - C | |
| 25. |
The boiling point elevation and freezing point depression of solutions have a number of partical applications. Ethylene glycol `(CH_(2)OH-CH_(2)OH)` is used in automobile radiatiors as an antifreeze because it lowers the freezing point of the coolant. The same substance also helps to prevent the radiator coolant from boiling away by elevating the boiling point. Ethylene glycol has low vapour pressure. We can also use glycerol as an antifreeze. In order for the boiling point elevation to occur, the solute must be non-volatile, but no such restriction applies to freezing point depression. For example, methanol `(CH_(3)OH)`, a fairly volatile liquid that boils only at `65^(@)C`, is sometimes used as an antifreeze in automobile radiators. `620 g` glycol is added to `4 kg` water in the radiator of car. What amount of ice will separate out at `-6^(@)C`?A. 800gB. 900gC. 600gD. 1000 g |
| Answer» Correct Answer - B | |
| 26. |
The boiling point elevation and freezing point depression of solutions have a number of partical applications. Ethylene glycol `(CH_(2)OH-CH_(2)OH)` is used in automobile radiatiors as an antifreeze because it lowers the freezing point of the coolant. The same substance also helps to prevent the radiator coolant from boiling away by elevating the boiling point. Ethylene glycol has low vapour pressure. We can also use glycerol as an antifreeze. In order for the boiling point elevation to occur, the solute must be non-volatile, but no such restriction applies to freezing point depression. For example, methanol `(CH_(3)OH)`, a fairly volatile liquid that boils only at `65^(@)C`, is sometimes used as an antifreeze in automobile radiators. Which of the following is a better reagent for depression in freezing point but not for elevation in boiling point?A. `CH_(3)OH`B. `{:(CH_(2)OH),(|),(CH_(2)OH):}`C. `{:(CH_(2)OH),(|),(CHOH),(|),(CH_(2)OH):}`D. `C_(6)H_(12)O_(6)` |
| Answer» Correct Answer - A | |
| 27. |
A `1.24 M` aqueous solution of `KI` has density of `1.15 g cm^(-3)`. Answer the following questions about this solution: The percentage composition of solute in the solution isA. 17.89B. 27.89C. 37.89D. 47.89 |
| Answer» Correct Answer - A | |
| 28. |
A `1.24 M` aqueous solution of `KI` has density of `1.15 g cm^(-3)`. Answer the following questions about this solution: The molality of this solution will beA. 2.61B. 1.31C. 4.12D. 3.12 |
| Answer» Correct Answer - B | |
| 29. |
Depression in freezing point is 6K for NaCl solution. If `K_(f)` for water is `1.86 "K kg mol"^(-1)`, amount of NaCl dissolved in 1kg water is :A. 3.42B. 1.62C. 3.24D. 1.71 |
| Answer» Correct Answer - B | |
| 30. |
Which of the following can be measured by the Oswald-Walker dynamic method ?A. Vapour pressure of the solventB. Relative lowering of vapour pressureC. Lowering of vapour pressureD. all of the above |
| Answer» Correct Answer - B | |
| 31. |
Vapour pressure increases with increase in :A. concentration of solution containing non-volatile soluteB. temperature upto boiling pointC. temperature upto triple pointD. altitude of the concerned place of boiling |
| Answer» Correct Answer - B | |
| 32. |
Cryoscopic constant is the depression in freezing point produced by :A. 1% solutionB. 1 molar solutionC. 1 molal solutionD. 1 N solution |
| Answer» Correct Answer - C | |
| 33. |
Cryoscopic constant of a liquid depends on :A. the latent heat of fusion of solventB. the freezing point of solventC. the concentration of solutionD. the melting point of solute |
| Answer» Correct Answer - A::B | |
| 34. |
The boiling point of a solution of 0.11 of a substance in 15g of ether was found to be `0.1^(@)C` higher than that of pure ether. The molecular weight of the substance will be `(K_(b)=2.16)` :A. 148B. 158C. 168D. 178 |
| Answer» Correct Answer - B | |
| 35. |
The number of moles of solute per kg of a solvent is called its :A. molarityB. normalityC. mole fractionD. molality |
| Answer» Correct Answer - D | |
| 36. |
A solution of `CaCl_(2)` is 0.5 mol/litre , then the moles of chloride ion in 500 mL will be :A. 0.5B. 0.25C. `1.0`D. 0.75 |
| Answer» Correct Answer - B | |
| 37. |
`{:(,"Set-I",,"Set-II"),("(A)","10 vol H"_(2)"O"_(2),1.,"Perhydrol"),("(B)","20 vol H"_(2)"O"_(2),2.,5.358N),("(C)","30 vol H"_(2)"O"_(2),3.,1.785N),("(D)","100 vol H"_(2)"O"_(2),4.,3.30%):}` The correct match is :A. A-4, B -3, C-2, D-1B. A-1, B-2, C-3, D-4C. A-1, B-3, C-2, D-4D. A-4, B-2, C-3, D-1 |
| Answer» Correct Answer - A::B::C::D | |
| 38. |
The osomotic pressure `pi` depends on the molar concentration of the solution `(pi=CRT)`. If two solutions are of equal solute concentration and, hence, have the same omotic pressure, they are said to be isotonic. If two solutions are of unequal osmotic pressures, the more concentrated solution is said to be hypertonic and the more diluted solution is described as hypotonic. Osmosis is the major mechanism for transporting water upward in the plants. Answer the following questions: Osmotic rise of a solution depends onA. densityB. temperatureC. nature of solventD. none of these |
| Answer» Correct Answer - A::B | |
| 39. |
The osomotic pressure `pi` depends on the molar concentration of the solution `(pi=CRT)`. If two solutions are of equal solute concentration and, hence, have the same omotic pressure, they are said to be isotonic. If two solutions are of unequal osmotic pressures, the more concentrated solution is said to be hypertonic and the more diluted solution is described as hypotonic. Osmosis is the major mechanism for transporting water upward in the plants. Answer the following questions: Isotonic solutions have sameA. densityB. molarityC. molalityD. mole fraction |
| Answer» Correct Answer - B | |
| 40. |
An electrolyte dissolves in water if :A. lattice energy is less than hydration energyB. lattice energy is greater than hydration energyC. lattice energy is equal to hydration energyD. dissolution in endothermic |
| Answer» Correct Answer - A | |
| 41. |
Which of the following will form an ideal solution ?A. `C_(2)H_(5)OH` and waterB. `HNO_(3)` and waterC. `CHCl_(3) and CH_(3)COCH_(3)`D. `C_(6)H_(6) and C_(6)H_(5)CH_(3)` |
| Answer» Correct Answer - D | |
| 42. |
Solution distilled without change in composition at a temperature is calledA. amporphousB. azeotropic mixtureC. supersaturatedD. ideal |
| Answer» Correct Answer - B | |
| 43. |
In mixture A and B ,components show -ve deviations as:A. `DeltaV_("mix")gt 0`B. `Delta V_("mix") lt 0`C. A -B interaction is weaker than A - A and B - B interactionsD. none of the above reasons is correct |
| Answer» Correct Answer - B | |
| 44. |
Which of the following behaviours is true for an ideal binary liquid solution?A. Plot of `P_("total") vs y_(A)` (mole fraction of A in vapour) is linearB. Plot of `P_("total") vs y_(B)` is linearC. Plot of `1//P_("total") vs y_(A)` is linearD. Plot of `1//P_("total") vs y_(B)` is non-linear |
| Answer» Correct Answer - C | |
| 45. |
Which one of the following is not an ideal solution?A. `C_(6)H_(6) and C_(6)H_(5)CH_(3)`B. `C_(2)H_(5)Cl and C_(2)H_(5)OH`C. `C_(6)H_(5)Cl and C_(6)H_(5)Br`D. `C_(2)H_(5)Br and C_(2)H_(5)I` |
| Answer» Correct Answer - B | |
| 46. |
The azetrophic mixture of water (b.pt. `100^(@)C`) and HCl (b.pt. `85^(@)C`) boils at `108.5^(@)C`. What this mixture is distilled, it is possible to obtain :A. pure HClB. pure waterC. pure water as well as HClD. neither HCl nor `H_(2)O` in their pure states |
| Answer» Correct Answer - D | |
| 47. |
Which of the following solution pairs can be separated by fractional distillation ?A. Water-`HNO_(3)`B. Water-HClC. Benzene-tolueneD. `C_(2)H_(5)OH`-water |
| Answer» Correct Answer - C | |
| 48. |
The expression relating molality (m) and mole fraction `(x_(2))` of solute in a solution is :A. `x_(2)=(mM_(1))/(1+mM_(1))`B. `x_(2)=(mM_(1))/(1-mM_(1))`C. `x_(2)=(1+mM_(1))/(mM_(1))`D. `x_(2)=(1-mM_(1))/(mM_(1))` |
| Answer» Correct Answer - A | |
| 49. |
Which of the following aqueus solution has highest freezing point ?A. 0.1 molal `Al_(2)(SO_(4)_(3))`B. 0.1 molal `BaCl_(2)`C. 0.1 molal `AlCl_(3)`D. 0.1 molal `NH_(4)Cl` |
| Answer» Correct Answer - D | |
| 50. |
A 0.6% urea solution would be isotonic with :A. 0.1 M glucose solutionB. 0.1 M KCl solutionC. 0.6% glucose solutionD. 0.6% NaCl solution |
| Answer» Correct Answer - C | |