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. |
According to collision theory for determining the variation of rate of reaction with temperature the rate constant,`k= Ae^(-Ea//RT).` For most of the practical purposes A and `E_(a`[Arrhenius factor and Activation energy] are temperature independent. However they may vary slightly. Assuming the conditions given above answer the following questions. For constant A and `E_(a),` which parameters when plotted will give a straight line with given slope?A. `"ln k vs T ,Slope" = (E_(a))/(R)`B. `"ln k vs" 1/T "slope" = (E_(a))/(R)`C. `"ln k vs"1/T,"slope"=(E_(a))/(R)`D. `"ln k vs" T,"slope"=(E_(a))/(R)` |
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Answer» Correct Answer - C |
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| 2. |
If an element can exist in several oxidation states, it is convenient to display the reduction potentials corresponding to the various half reactions in diagrammatic from, known as Latimer diagram. The Latimer diagram for chlorine in acid solution is `Cl_(4)^(-)overset(+1.20V)toClO_(3)^(-)overset(+1.60V)toClO_(2)^(-)overset(+1.60V)to` `ClO^(-)overset(+1.67V)toCl_(2)overset(+1.36V)toCl^(-)` In basic solution is : `ClO_(4)^(-)overset(+0.37V)toClO_(3)^(-)overset(+0.30V)toClO_(2)^(-)overset(+0.68)to` `ClO^(-)overset(+0.42V)toCl_(2)overset(+1.36)toCl^(-)`. The standard potentials for two nonadjacent species can also be calculated by using the concept that `DeltaG^(@)` is an additive property but using potential is not an assitive property and `DeltaG^(@)=-nFx^(0),` If a given oxidation state is a the next higher oxidation state disproportionation can occur. The reverse of relative stabilities of the oxidation state can also be understood by drawing a graph of `DeltaG^(@)//F` against oxidation state, known as Frost diagram, Choosing the stability of zero oxidation state arbitrery as zero. The most stable oxidation state of a apecies lies lowest in the digram Disproportionation is spontaneous if the species lies above a straight line joining its two product species. Which of the following couple have same value of potential at pH = 0 and pH = 14?A. `(ClO_(4)^(-))/(ClO_(3)^(-))`B. `(ClO_(2)^(-))/(Cl_(2))`C. `(ClO^(-))/(Cl_(2))`D. `(Cl_(2))/(Cl^(-))` |
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Answer» Correct Answer - D |
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| 3. |
According to the phase diagram shown, where does a mixture of solid and liquid exist at equilibrium ? A. Along line MNB. Along line KNC. Along line LND. In the region KNL |
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Answer» Correct Answer - B |
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| 4. |
If an element can exist in several oxidation states, it is convenient to display the reduction potentials corresponding to the various half reactions in diagrammatic from, known as Latimer diagram. The Latimer diagram for chlorine in acid solution is `Cl_(4)^(-)overset(+1.20V)toClO_(3)^(-)overset(+1.60V)toClO_(2)^(-)overset(+1.60V)to` `ClO^(-)overset(+1.67V)toCl_(2)overset(+1.36V)toCl^(-)` In basic solution is : `ClO_(4)^(-)overset(+0.37V)toClO_(3)^(-)overset(+0.30V)toClO_(2)^(-)overset(+0.68)to` `ClO^(-)overset(+0.42V)toCl_(2)overset(+1.36)toCl^(-)`. The standard potentials for two nonadjacent species can also be calculated by using the concept that `DeltaG^(@)` is an additive property but using potential is not an assitive property and `DeltaG^(@)=-nFx^(0),` If a given oxidation state is a the next higher oxidation state disproportionation can occur. The reverse of relative stabilities of the oxidation state can also be understood by drawing a graph of `DeltaG^(@)//F` against oxidation state, known as Frost diagram, Choosing the stability of zero oxidation state arbitrery as zero. The most stable oxidation state of a apecies lies lowest in the digram Disproportionation is spontaneous if the species lies above a straight line joining its two product species. For a hypothetical element, the Frost diagram is shown in figure Which of the following oxidation state is least stable ?A. -1B. 0C. 2D. 3 |
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Answer» Correct Answer - D |
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| 5. |
If an element can exist in several oxidation states, it is convenient to display the reduction potentials corresponding to the various half reactions in diagrammatic from, known as Latimer diagram. The Latimer diagram for chlorine in acid solution is `Cl_(4)^(-)overset(+1.20V)toClO_(3)^(-)overset(+1.60V)toClO_(2)^(-)overset(+1.60V)to` `ClO^(-)overset(+1.67V)toCl_(2)overset(+1.36V)toCl^(-)` In basic solution is : `ClO_(4)^(-)overset(+0.37V)toClO_(3)^(-)overset(+0.30V)toClO_(2)^(-)overset(+0.68)to` `ClO^(-)overset(+0.42V)toCl_(2)overset(+1.36)toCl^(-)`. The standard potentials for two nonadjacent species can also be calculated by using the concept that `DeltaG^(@)` is an additive property but using potential is not an assitive property and `DeltaG^(@)=-nFx^(0),` If a given oxidation state is a the next higher oxidation state disproportionation can occur. The reverse of relative stabilities of the oxidation state can also be understood by drawing a graph of `DeltaG^(@)//F` against oxidation state, known as Frost diagram, Choosing the stability of zero oxidation state arbitrery as zero. The most stable oxidation state of a apecies lies lowest in the digram Disproportionation is spontaneous if the species lies above a straight line joining its two product species. Which of the following statement is correct according to above question ?A. `A^(+1)` undergoes disproportionation into A and `A^(2+)`B. `A^(2+)` undergoes disproportionation in A and `A^(3+)`C. A undergoes comproportionation into `A^(+1)` and `A^(-1)`D. All of the above |
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Answer» Correct Answer - A |
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| 6. |
According to this phase diagram, which phases can exist at pressure lower than the triple point pressure ? A. Gas onlyB. Solid and gas onlyC. Liquid onlyD. Solid and liquid only |
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Answer» Correct Answer - B |
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| 7. |
Observe the P-T phase diagram for a given substance A. Then melting point of `A(s)`, boiling point of `A(l)`, critical point of A and triple point of A (at their respective pressure) are respectively: A. `T_(1),T_(2),T_(3),T_(4)`B. `T_(4),T_(3),T_(1),T_(2)`C. `T_(3),T_(4),T_(2),T_(1)`D. `T_(2),T_(1),T_(3),T_(4)` |
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Answer» Correct Answer - C |
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| 8. |
What is the normal boiling point of the solution represented by the phase diagram ? A. AB. BC. CD. D |
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Answer» Correct Answer - D |
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| 9. |
What is the normal freezing point of the solution represented by the phase diagram ? A. `T_(1)`B. `T_(2)`C. `T_(3)`D. `T_(0)` |
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Answer» Correct Answer - A |
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| 10. |
The curve represents the titration of : A. a diprotic acidB. two monoprotic acids with the same `K_(a^(s))` but different concentrations.C. two monoprotic acid with different `K_(a^(s))` but the same concentrationsD. two monoprotic acids with different `K_(a^(s))` and different concentrations. |
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Answer» Correct Answer - D |
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| 11. |
Which statement is correct about the substance represented by this phase diagram ? A. The solid sublimes at 1 atm pressureB. Its normal boiling point is above 300 KC. It exists as a liquid at `25^(@)C` and 1 atm pressureD. The density of the solid is greater than that of the liquid |
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Answer» Correct Answer - D |
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| 12. |
Given curve represents A. 3s orbitalB. 4s orbitalC. 2s orbitalD. 2s orbital |
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Answer» Correct Answer - B |
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| 13. |
What can be concluded about the substance represented by this phase diagram ? A. The normal boiling point of the liquid is `80^(@)C`B. The solid is more dense than the liquidC. The solid sublimes at temperatures above `20^(@)C`.D. The vapour can be converted to liquid by compressing it at temperatures below `20^(@)C` |
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Answer» Correct Answer - B |
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| 14. |
For a reaction `A +B rarr C`, it is observed that half life of A (when B is taken in very large amount) is independent of concentration of A and the graph of `(1)/([B])` us time is given below when `[A] = [B]`. What is order of reaction with respect to B ? A. 4B. 3C. 2D. 1 |
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Answer» Correct Answer - D |
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| 15. |
What can be concluded about the values of `DeltaH` and `DeltaS` from this graph ? A. `DeltaH gt 0, DeltaS gt 0`B. `DeltaH gt 0, DeltaS lt 0`C. `DeltaH lt 0, DeltaS gt 0`D. `DeltaH lt 0, DeltaS lt 0` |
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Answer» Correct Answer - A |
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| 16. |
The radial probability distribution curve for an orbitals comprises of 3 maxima. If the orbital has 3 angular nodes as well, then the orbital can be:A. 5fB. 7dC. 6fD. 7f |
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Answer» Correct Answer - C |
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| 17. |
Which of following has correct matching of curve and orbital ? A. `P (2p) Q (!s) R (4p)`B. `P(3p) Q(3d) R (3s)`C. `P(4d) Q (2p) R (5d)`D. `P (2s) Q (4f) R (3d)` |
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Answer» Correct Answer - B::C |
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| 18. |
R(r) is the radial part of the wave function and r is the distance of electron from the nucleus. |
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Answer» Correct Answer - a-p; b-q; c-r,s,t; d-r,s,t |
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| 19. |
For a reaction `A rarr B, E_(a) = 10 kJ mol^(-1), DeltaH = 5 kJ mol^(-1)`. Thus, potential energy profile for this reaction is:A. B. C. D. |
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Answer» Correct Answer - B |
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| 20. |
Which straight line gives the activation energy for a reaction?A. Rate constant vs TB. In (rate constant) vs TC. Rate constant vs `T^(-1)`D. In (rate constant) vs `T^(-1)` |
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Answer» Correct Answer - D |
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| 21. |
Consider the following radial distribution function diagrams. Which of the following has the correct matching of curve and orbital ? A. `I(3s),II(3p),II (3d)`B. `I (3d), II (3p), III (3s)`C. `I (3p), II (3d), III (3s)`D. `I (3s), II (3d), III (3p)` |
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Answer» Correct Answer - C |
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| 22. |
Adjoining diagram, represents the energy profile for the reaction : `A + B rarr C +D`. What is the valye of the activation energy for the reaction ? `C +D rarr A +B` ? A. 25 kJB. 55 kJC. 85 kJD. `-30 kJ`s |
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Answer» Correct Answer - A |
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| 23. |
This diagram represents the behaviour of a pure solvent upon cooling. Which of the diagrams below best represents the cooling curve of a solution in that solvent upon cooling ? (Assume that all diagrams are drawn to the same scale.) A. B. C. D. |
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Answer» Correct Answer - C |
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| 24. |
In adjoining diagram depicts the temperature behaviour of the rate constant k, for two reactions,1 and 2. Which statement about the k values at low temperature and the activation energies, `E_(a)`, for these reactions is correct ? A. `{:(k "values at low" T,E_(a) "values"),(k rxn 1 lt k rxn 2,E_(a) rxn 1 lt E_(a) rxn 2):}`B. `{:(k "values at low" T,E_(a) "values"),(k rxn 1 lt k rxn 2,E_(a) rxn 1 gt E_(a) rxn 2):}`C. `{:(k "values at low" T,E_(a) "values"),(k rxn 1 gt k rxn 2,E_(a) rxn 1 lt E_(a) rxn 2):}`D. `{:(k "values at low" T,E_(a) "values"),(k rxn 1 gt k rxn 2,E_(a) rxn 1gt E_(a) rxn 2):}` |
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Answer» Correct Answer - B |
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| 25. |
A reaction follows the given concentration `(M)` vs time graph. The rate for this reaction at 20 seconds will be : A. `6xx10^(-3)M.sec^(1)`B. `8xx10^(-3).L^(-1).sec^(-1)`C. `2xx10^(-2)M*sec^(-1)`D. `1xx10^(-1)M*sec^(-1)` |
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Answer» Correct Answer - A |
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| 26. |
Adjoining graph is for a reaction which have only single reactant (R) and order of reactions depends only on that single reactant then possible order of reactions depends only on that single reactant then possible order of reaction may be: A. first order reactionB. 1/2 order reactionC. `-2` order reactionD. zero order reaction |
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Answer» Correct Answer - D |
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| 27. |
For a 1st order reaction, `nA rarr B` whose concentration vs time curve is shown ahead. If half life for the reaction is 24 minutes, the value of n is: A. 1B. 2C. 3D. 4 |
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Answer» Correct Answer - C |
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| 28. |
Rate of reaction `A rarr B` depends only on A and can be represented by below curve then: A. molecularity of reaction must be oneB. reaction will be an elementary reactionC. value of rate constant for reaction will be `1M^(-1//2) sec^(-1)`D. reaction will definitely be a complex reaction |
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Answer» Correct Answer - D |
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| 29. |
Rate law of the reaction `A rarr` Product is, rate `= k[A]`. Graphically it is represented as: Hence, rate constant is:A. `3xx 10^(-4)s^(-1)`B. `1 xx 10^(-2) s^(-1)`C. `3 xx 10^(-2)s^(-1)`D. `1 xx 10^(-4)s^(-1)` |
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Answer» Correct Answer - B |
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| 30. |
In the graph of , if we use the term fluid for either a gas or a liquid, then which of the following can be true statement(s)?A. Liquid can be viewed as a very dense gasB. Liquid and gas can be distingusihed only when the fluid is below its critical temperature and its pressure and volume lie under the done of graphC. Under the dome, liquid `hArr` gas (equilibrium) and a surface separating the two phases is visible.D. In the absence of surface, there is no fundamental way of distinguishing between two states. |
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Answer» Correct Answer - A::B::C::D |
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| 31. |
Figure explains elevation in boiling point when a non-volatile solute is added to a solvent. Variation of vapour pressure with temperaure and elevation in boiling point is marked. Given that `DeltaT_(b)` is the elevation in boiling point of the solvent in a solution of molarity m then `lim_(m rarr 0) ((Delta T_(b))/(m))` is equal to:A. `K_(b)` (molal elevation constant)B. `L_(v)` (latent heat of vaporisation)C. `DeltaS` (entropy change)D. x (mole fraction of solute) |
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Answer» Correct Answer - A |
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| 32. |
The phase diagrams for the pure solvent (solid lines) and the solution (non-volatile solute, dashed line) are recorded below. The quantity indicated by L in the figure is: A. `Deltap`B. `DeltaT_(f)`C. `K_(b)m`D. `K_(f)m` |
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Answer» Correct Answer - C |
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| 33. |
The curve in the accompanying diagram represent the `PV//RT` behaviour of the gases: `He, CH_(4)` and `C_(3)H_(8)`. Which assignment of behavior for gas is correct ? A. `1 = He, 2 = CH_(4), 3 = C_(3)H_(8)`B. `1 = C_(3)H_(8), 2 = CH_(4), 3 = He`C. `1 = CH_(3), 1 = C_(3)H_(8), 3 = He`D. `1 = C_(3)H_(8), 2 = He, 3 = CH_(4)` |
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Answer» Correct Answer - B |
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| 34. |
What quantity is represented by the slope of the dashed line in the accompanying diagram for the concentration change in a reaction ? A. Instantaneous reaction rateB. Rate constantC. Reaction order for that reactantD. Activation energy |
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Answer» Correct Answer - A |
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| 35. |
For the reaction represented by the accompanying diagram, which reaction rate is the greatest ? A. Average rateB. Final rateC. Initial rateD. Rate at 20 seconds |
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Answer» Correct Answer - C |
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| 36. |
Supercritical carbon dioxide exists at which point on the accompanying phase diagram ? A. AB. BC. CD. D |
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Answer» Correct Answer - C |
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| 37. |
In the above Maxwellian plot at two different temperatures which of the following statements may be true? A. Area under the two plots is the sameB. Fraction of molecules with speed `U_(1) gt U_(2)`C. `U_(2) gtU_(1) and T_(2) gt T_(1)`D. `U_(MPS)` at `T_(1) lt U_(RMS)` at `T_(2),U_(RMS)` at `T_(1) ltU_(RMS)` at `T_(2)` |
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Answer» Correct Answer - A::B::C::D |
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| 38. |
The value of the specific rate constant, k, for a reaction is determined at two different temperatures and plotted in the accompanying graph. What is the relationship between the slope of the graph and the activation energy, `E_(a)`? A. slope `= E_(A)`B. slope `= - E_(a)`C. slope `= -E_(a)//R`D. slope `= E_(a) xx R` |
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Answer» Correct Answer - C |
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| 39. |
For the following graph, drawn from two different samples of gases at two different temperatures `T_(1) and T_(2)`, which of the following statements is/are necessarily true? A. if `T_(2) gt T_(1),M_(B)` is necessarily greater than `M_(A)`B. if `T_(1) gt T_(2), M_(A)` is necessarily greater than `M_(B)`C. `(T_(2))/(M_(B))gt(T_(1))/(M_(A))`D. Nothing can be predicted. |
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Answer» Correct Answer - B::C |
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| 40. |
A sample of 2 kg of helium (assumed ideal) is taken through the process ABC and another sample of 2 kg of the same gas is taken through the process ADC. Then, the temperature of the states A and B are : (Given `R = 8.3 J//"mol"-K)`: A. `T_(A) = 120.5 K, T_(B) = 120.5K`B. `T_(A) = 241 K, T_(B) = 241 K`C. `T_(A) = 120.5 K, T_(B) = 241 K`D. `T_(A) = 241 K, T_(B) = 482 K` |
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Answer» Correct Answer - C |
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| 41. |
For the below graph which of the following combination is correct, (n represents mole and P represent pressure) (I) If n is constant throughout then P at 2nd point must be greater than at 1st point. (II) If n is doubled in moving from 1st point to 2nd point then P also doubles in the process. (III) If n is constant then P is maximum at point (1). A. I is trueB. II is trueC. Both II and III are trueD. I, II and III all are correct |
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Answer» Correct Answer - A |
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| 42. |
When a graph between log K and `1//T` is drawn a straight line is obtained. The point at which line cuts y-axis and x-axis respectively correspond to the temperature :A. `0, (E_(n))/(2.303) R log A`B. `oo, E_(a)//(R ln A)`C. `0, logA`D. none of these |
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Answer» Correct Answer - B |
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| 43. |
Graph between `log x//m` and `log p` is a straight line inclined at an angle of `45^@` . When pressure is `0.5 atm` and `1n k = 0.693`, the amount of solute adsorbed per gram of adsorbent will be:A. 1B. `1.5`C. `0.25`D. `2.5` |
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Answer» Correct Answer - A |
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| 44. |
Graph between log k and `(1)/(T)` (k is rate constant in `s^(-1)` and T is the temperature in K) is a straight line. As shown in figure if OX = 5 and slope of the line `=- (1)/(2.303)`then `E_(a)` is : A. `2.303 xx 2 cal`B. `(2)/(2.303) cal`C. 2 calD. none of these |
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Answer» Correct Answer - C |
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| 45. |
One mole of an ideal gas is subjected to a two step reversible process A-B and B-C. The volume at A and C is same. Find the value of the ratio `("Pressure of gas at C")/("Pressure of gas at A")` |
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Answer» Correct Answer - 3 |
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| 46. |
An ideal gas is subjected to two different process in which it is heated to same final temperature from same initial state (A) as shown in diagram, then : A. heat absorbed by the system will be more in AB process.B. heat absorbed by the system will be more in AC processC. heat absorbed by the system will be same in AB and AC processD. None of the above |
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Answer» Correct Answer - B |
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| 47. |
An ideal gas is subjected to the following changes. Answer the following questions: (a) A curve showing the dependence of pressure on absolute temperature was obtained for a certain gas. Does compression or expansion takes place when the gas is being heated [constant moles]? `{:("Code","Process"),(1,"Compression"),(2,"Expansion"):}` (b) Use the volume temperature curve to find graphically the nature of change in the pressure of a gas during heating [constant moles.] `{:("Code","Process"),(3,"Increases"),(4,"Decreases"),(5,"Remains constant"):}` (c) The piston in a gas filled cylinder is lossely fitted aganist the wall of the cylinder and can slowly let the gas go past it. The volume temperature curve for the gas at constant pressure has the form shown in the figure. Use this curve to determine whether the amount of gas in the cylinder has increased or decreased. `{:("Code","Amount of Gas"),(6,"Increases"),(7,"Decreases"),(8,"Remains constant"):}` Write your answer as "abc", for example if your answer is code: 1,4,8 the, write your answer as 148. |
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Answer» Correct Answer - 247 |
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| 48. |
For an ideal gas if heat given in process AB is 10kJ then answer the following questions. `(1"bar".l=0.1kJ)` Enthalpy change in process BCD is :A. `697 kJ`B. `1526 kJ`C. `3278 kJ`D. `1135 kJ` |
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Answer» Correct Answer - C |
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| 49. |
For an ideal gas if heat given in process AB is 10kJ then answer the following questions. `(1"bar".l=0.1kJ)` The `DeltaH` for the process AB is :A. `11kJ`B. `9 kJ`C. `10 kJ`D. `12 kJ` |
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Answer» Correct Answer - A |
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| 50. |
Which of the following graph is incorrect for variation of rate constant (K) with temperature for a reaction obeying Arrhenius equation ?A. B. C. D. |
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Answer» Correct Answer - B |
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