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. |
For the percipitation reaction of `Ag^(o+)` ions with `NaCI`, which of the following statements is true?A. `DeltaH` is zero for the reactionB. `DeltaG` is zero for the reactionC. `DeltaG` is negative for the negativeD. `DeltaG` should be equal to `DeltaH` |
| Answer» Correct Answer - C | |
| 2. |
Assertion (A): There is no reaction known for which `DeltaG` is positive, yet it is spontaneous. Reason (R ) : For photochemical reaction, `DeltaG` is negative.A. If both (A) and (R) are correct and (R) is the correct reason for (A).B. If both (A) and (R) are correct but (R) is not the correct explanation for (A).C. If (A) is true but (R) is falseD. If both (A) and (R) are false. |
| Answer» Correct Answer - D | |
| 3. |
Which statement (s) is/are true? 1. `S^(Theta)` values for all elements in their states are positive. 2. `S^(Theta)` values for all aqueous ions are positive. 3. `DeltaS^(Theta)` values for all spontaneous reactions are positive.A. 1 onlyB. 1 and 2 onlyC. 2 and 3 onlyD. all of these |
| Answer» Correct Answer - A | |
| 4. |
The enthalpy changes at 298 K in successive breaking of `O-H` bonds of water, are `H_(2)O(g) rarr H(g)+OH(g),DeltaH=498kJ mol^(-1)` `OH(g) rarr H(g)+O(g), DeltaH =428 kJ mol^(-1)` The bond energy of the O-H bond isA. 498 kJ `mol^(-1)`B. 463 kJ `mol^(-1)`C. 428 kJ `mol^(-1)`D. 70 kJ `mol^(-1)` |
| Answer» Correct Answer - B | |
| 5. |
Assertion (A): The Joules -Thomon coefficient for an ideal gas is zero. Reason (R ) : There are no intermlecular attactive forces in an ideal gas.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 the correct explanation for (A).C. If (A) is correct but (R) is incorrectD. If (A) is incorrect but (R) is correct. |
| Answer» Correct Answer - A | |
| 6. |
Bond energies can be obtained by using the following relation: `DeltaH (reaction) = sum`Bond energy of bonds, broken in the reactants `-sum` Bond energy fo bonds, formed in the products Bond enegry depends on three factors: a. Greater is the bond length, lesser is the bond enegry. b. Bond energy increases with the bond multiplicity. c. Bond enegry increases with electronegativity difference between the bonding atoms. In `CH_(4)` molecule, which of the following statement is correct about the `C -H` bond enegry?A. All C-H bonds of methane have same energyB. Average of all C-H bond energies is consideredC. Fourth C-H bond requires highest energy to breakD. none of the above |
| Answer» Correct Answer - B | |
| 7. |
3 moles of `CO_(2)` gas expands isothermally against external pressure of 1 bar. Volume increases from 10 L to 30 L respectively. The system is in thermal contact of surroundings at temperature `15^(@)C`. Entropy change in isotehrmal process is: `DeltaS=2.303nR" log "((V_(2))/(V_(1)))`. Q. If `CO_(2)` behaves like an ideal gas, then entropy change of system `(DeltaS_("system"))` will be:A. `+27.4JK^(-1)`B. `9.1JK^(-1)`C. `-27.4JK^(-1)`D. `-9.1JK^(-1)` |
| Answer» Correct Answer - A | |
| 8. |
3 moles of `CO_(2)` gas expands isothermally against external pressure of 1 bar. Volume increases from 10 L to 30 L respectively. The system is in thermal contact of surroundings at temperature `15^(@)C`. Entropy change in isotehrmal process is: `DeltaS=2.303nR" log "((V_(2))/(V_(1)))`. Q. Select the correct relation:A. `DeltaS_("system")gt0,DeltaS_(surr).=0`B. `DeltaS_(surr)lt0,DeltaS_("system")gt0`C. `DeltaS_("system")=0,DeltaS_(surr).=0`D. `DeltaS_(surr)gt0,DeltaS_("system")lt0` |
| Answer» Correct Answer - B | |
| 9. |
For an ideal gas Joule-Thomon coefficient is:A. zeroB. positiveC. negativeD. depends on atomicity of gas |
| Answer» Correct Answer - A | |
| 10. |
Statement -1 in the following reaction : `C(s)+O_(2)(g)to CO_(2) (g), DeltaH=DeltaU-RT` Statement -2: `DeltaH` Is related to `DeltaU ` by the equation , `DeltaH=Delta+Deltan_(g)RT`A. If both (A) and (R) are correct and (R) is the correct reason for (A).B. If both (A) and (R) are correct but (R) is not the correct explanation for (A).C. If (A) is true but (R) is falseD. If both (A) and (R) are false. |
| Answer» Correct Answer - D | |
| 11. |
When solid `NH_(4)NO_(3)` is dissolved in water at `25^(@)C`, the temperature of the solution decreases. What is true about the signs of `DeltaH and DeltaS` for this process?A. `{:(DeltaH,DeltaS),(-,+):}`B. `{:(DeltaH,DeltaS),(-,-):}`C. `{:(DeltaH,DeltaS),(+,+):}`D. `{:(DeltaH,DeltaS),(+,-):}` |
| Answer» Correct Answer - C | |
| 12. |
For which of these processes is the value of `Delta S` negative? i. Sugar is dissolved in water. ii. Steam condenses on a surface. iii. `CaCO_(3)` is decomposed into `CaO` and `CO_(2)`.A. I onlyB. II onlyC. I and III onlyD. II and III only |
| Answer» Correct Answer - B | |
| 13. |
Statement-1: Mass, volume and pressure are extensive properties. Statement-2: Extensive properties depent upon the amount of the substance.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 explnation for statement-1C. Statement-1 is true, statement-2 is false.D. Statement-1 is false, statement-2 is true. |
| Answer» Correct Answer - A | |
| 14. |
A refrigerator is used to remove heat from enclosure at `0^(@)C` at the rate of 600 watt. If the surroundings temperature is `30^(@)C`, calculate the power needed:A. 303 wattB. 11000 wattC. 65.9 wattD. 110 watt |
| Answer» Correct Answer - C | |
| 15. |
Statement-1: Most of the combustion reacton are exothermic. Because Statement-2: Products are more stable than reactants in exothermic process.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 explnation for statement-1C. Statement-1 is true, statement-2 is false.D. Statement-1 is false, statement-2 is true. |
| Answer» Correct Answer - A | |
| 16. |
The Clausius-Clapeyron equation may be given as:A. `log_(10)((P_(2))/(P_(1)))=(DeltaH_(vap))/(2.303R)[(1)/(T_(1))-(1)/(T_(2))]`B. `(dP)/(dT)=(q)/(TDeltaV)`C. `(dP)/(dT)=(q)/(TDeltaV)`D. `(dP)/(dT)=(DeltaV)/(DeltaS)` |
| Answer» Correct Answer - A::B::C | |
| 17. |
For which process does `DeltaU = 0` holds true?A. Cyclic processB. Isothermal expansionC. Isochoric processD. Adibatic process. |
| Answer» Correct Answer - A::B | |
| 18. |
If `x` and `y` are arbitrary intensive variables, thenA. xy is an intensive variableB. `(x)/(y)` is an intensive variable.C. `(x+y)` is an intensive variableD. `(dx)/(dy)` is an extensive property. |
| Answer» Correct Answer - A::B::D | |
| 19. |
Select the state functions amont the following:A. temperatureB. entropyC. workD. enthalpy |
| Answer» Correct Answer - A::B::D | |
| 20. |
Assertion(A) : The value of enthalpy of neutralization of a weak acid by strong base is numerically less than `57.1 kJ`. Reason(R ) : All `OH^(-)` ions of strong base are not completely neutralized by `H^(+)` ions obtained from acid.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 explnation for statement-1C. Statement-1 is true, statement-2 is false.D. Statement-1 is false, statement-2 is true. |
| Answer» Correct Answer - C | |
| 21. |
Which of the following statements is correct?A. Slope of adiabatic P-V curve will be same as that in isothermal oneB. Slope of adiabatic P-V curve will be same as that in isothermal oneC. Slope of adiabatic P-V curve will be larger than in isothermal oneD. Slope of adiabatic P-V curve will be zero. |
| Answer» Correct Answer - C | |
| 22. |
Statement-1: There is no exchange in internal energy in a cyclic process. Statement-2: In a cyclic process, the system returns to original state in a number of steps.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 explnation for statement-1C. Statement-1 is true, statement-2 is false.D. Statement-1 is false, statement-2 is true. |
| Answer» Correct Answer - A | |
| 23. |
Statement-1: Heat of solution is positive when `Na_(2)SO_(4)*10H_(2)O` is dissolved in water bu it is negative when anhydrous `CuSO_(4)` is dissolved in water. Statement-2: Molar masses of `Na_(2)SO_(4)*10H_(2)O and CuSO_(4)` are different.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 explnation for statement-1C. Statement-1 is true, statement-2 is false.D. Statement-1 is false, statement-2 is true. |
| Answer» Correct Answer - C | |
| 24. |
Match the list-I with list-II and select the correct answer from the given codes: .A. I-C,II-B,III-D,IV-AB. I-B,II-CltIII-D,IV-AC. I-A,II-B,III-C,IV-DD. I-D,II-A,III-B,IV-C |
| Answer» Correct Answer - A | |
| 25. |
`((delH)/(delP))_(T)` for an ideal gas is equal to:A. zeroB. `(DeltaVRT)/(P)`C. `(PDeltaV)/(T)`D. `nRDeltaT` |
| Answer» Correct Answer - A | |