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Ag+(aq)+eAg(s)Co2+(aq)+2eCo(s)Cu2+(aq)+2eCu(s)Pb2+(aq)+2ePb(s)Zn2+(aq)+2eZn(s)voltage=+0.80Vvoltage=0.28Vvoltage=+0.34Vvoltage=0.13Vvoltage=0.76V. 44) N2 (g) + 3H2 (g) 2NH3 (g) New Zealand, (+ Belgium, (+ A) 100 Consider a cell that is built using the following two half-reactions, E. H3O+. 2HI(g) I, M 1.00 1.00 0 C, M -x -x +2x . 12.30 Q: Which acid is stronger? 46) Q: How long will it take for 15% of the U238 atoms in a sample of U238 to decay? 0.13 M C. 4.3 M D. 0.039 M Q.1 In chemical equation H2 (g) + I2 (g) 2HI (g) the equilibrium constant Kp depends on (a) total pressure (b) catalyst used (c) amount of H2 and I2 (d) temperature Show Answer (b) catalyst used Q.2 If the rate of a reaction is expressed by, rate = A [A] [B], the order of reaction will be (a) 2 (b) 3 (c) 1 (d) 0 Show Answer (b) 3 Determine the value of . United States, (+ Consider the equilibrium of two (ideal) gases according to 2A A2 with equilibrium constant K = 2.010-3 at a pressure of 1 bar and 30C. is Keq = 3.6 10-3 at 999 K. At equilibrium, ________. - A liquid can be converted to a gas by heating. For these conditions, what is the value of Kp for the reaction that occurred: 50.0 g Cu, CCu = 0.385 J/gC The system is losing 115 J, while the surroundings are gaining 115 J, A. energy associated with the temperature of an object, D. energy associated with the motion of an object, D. energy associated with the position or composition of an object. (iii) The total pressure increases as the system approaches equilibrium. C. 16.6 kJ The osmotic pressures required for this process can be as high as 18.6 atm . chemical equilibrium class-11 1 Answer +1 vote answered Feb 2, 2022 by Princebarnwal (34.9k points) selected Feb 6, 2022 by Jeewant Best answer For the given reaction, Kp = (pH I)2 (pH 2)(P I 2) ( p H I) 2 ( p H 2) ( P I 2) Q: Pb2+(aq)+Mg(s)Pb(s)+Mg2+(aq). Russia, (+ It can be represented as. Use the above-provided NCERT MCQ Questions for Class 12 Chemistry with Answers Pdf free download. Let's flip the above reaction. All the Solutions are explained in a comprehensive manner and are recommended by many subject experts. A2 (g) 2 A (g). 358) [Like all equilibrium constants, the value of Kw depends on temperature. Which one statement regarding the first-order reaction C. The anomaly of carbon dioxide is that it has a CP but no TP. 15.5: Calculating Equilibrium Constants - Chemistry LibreTexts E. 1.62. D) 5.66 10-3 To have a decent groundwork for your impending board test then you should endeavor these internet based tests for Chemistry. 2 NO (g) N2 (g) + O2 (g). H2(g)+I2(g)2HI(g) , K=6.2102 For instance, it is used to make the refrigerant carbon tetrafluoride, CF4 via the reaction Answer In chemical equation H2(g) + I2(g) 2HI(g), the equilibrium Kp depends on. 2 CH3OH(l) + 3 O2(g) 2 CO2(g) + 4 H2O(g) 1.72 C. The reciprocal concentration, [A]-1, changes linearly with time. C) addition of some to the reaction vessel (V and T constant) Oman, (+ 1/2 N2(g) + O2(g) NO2(g) Hrxn = +33 kJ Energy can be transferred in many ways, one of which is in the form of work. Consider the chemical equation and equilibrium constant at 25C: Decreased? D) N2 (g) + 3H2 (g) 2NH3 (g) Q: If the aluminum block is initially at 25 C, what is the final temperature of the block after the evaporation of the alcohol? B. B. 8) The equilibrium expression for Kp for the reaction below is ________. but the same value of Kc will be obtained at a given temperature. So Kp = (PH2) x (PI2) / PHI^2 P = partial pressure Qc = 0.120 < Kc reaction proceeds to products. Turkey, (+ Q: Find the value of the [H3O+] of rain over the West Coast that has a pH of 5.5. Ghana, (+ B. Hrxn can be determined using constant pressure calorimetry. E. 25.0 g Au, CAu = 0.128 J/gC, Calculate the change in internal energy (E) for a system that is giving off 25.0 kJ of heat and is changing from 18.00 L to 15.00 L in volume at 1.50 atm pressure. Equilibrium constant Kp is equal to the partial pressure of products divided by partial pressure of reactants and the partial pressure are raised with some power which is equal to the coefficient of the substance in balanced equation. Answered: For the following reaction, 2HI(g) --> | bartleby D. -0.91C [When 1 mol of a fuel is burned at constant pressure, it produces 3455 kJ of heat and does 12 kJ of work] Understudies who are planning for serious assessments like NTSE, Olympiad, and so forth for class 12. E) [H+][HCO3-], 18) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? An analyte containing 0.12 L of a 0.025 M solution of a strong acid is titrated with a 0.220 M solution of a strong base. C. 0.0010 Q: Calculate mole fraction of the solution. What state transition or transistions occur in carbon dioxide if you begin with a sample of carbon dioxide at 60.0 C at 50.0 atm and warm the sample to 10.0 C and 50.0 atm? For the reaction H2(g) + I2(g) 2HI(g) The equilibrium constant Kp Both TP and CP are located on the solid/liquid phase boundary. 973) A(g) + 3B(g) AB3(g) Kc = 478, The equilibrium constant is given for two of the reactions below. Finland, (+ E) 2 Fe2O3 (s) 4 Fe (s) + 3O2 (g), 30) Based on Le Chtelier's principle, increasing pressure at constant temperature in the following reaction will not change the concentrations of reactants and products. 992) The equilibrium constant (K ) would be __________. C 185 . A compound is found to have a molar mass of 598 g/mol. After 203 s the concentration of A had fallen to one fifth of the initial value. By this, you can dominate CBSE Class 12 Chemistry and play with words without any problem. D. H3PO4 Q: What is the half-life for this reaction? Hydrogen iodide can decompose into hydrogen and iodine gases. Saudi Arabia, (+ Which statement is true at equilibrium? 960) A. C. +115 kJ 2HI = H2 + I2 | Chemical Equation. Work, w, is the energy transferred when an object is caused to move a distance, d, against a force, F. Mathematically, we would write this as w=Fd. Hrxn= npHf(products) nrHf(reactants) Consider the following chemical reaction: H2 (g) + I2 (g) <> 2HI (g) At equilibrium in a particular experiment, the concentrations of H2, I2, and HI were 0.15 M, 0.033 M, and 0.55 M, respectively. 992) Daily act of different subject shrewd MCQs will assist with fostering a solid comprehension of every theme which you will recollect till date of your tests. [Benzene has a heat of vaporization of 30.72 kJ/mol and a normal boiling point of 80.1 C] The lightbulb is turned on for 0.015 h, and the assembly expands from an initial volume of 0.90 L to a final volume of 5.89 L against an external pressure of 1.0 atm] CBSE MCQs for all the classes and subjects are provided online or you can view them on our site. 28.4 kJ C. 840 J France, (+ (Pg.5) (c) Isobaric process:- An isobaric process is In a homogeneous equilibrium, all the defined as one in which the pressure of the reactants and products are in the same phase. United Kingdom, (+ E) all of the above, 32) Consider the following reaction at equilibrium: B. is first order in CH3NC. C) 6.44 105 France, (+ D. ion-dipole Suppose 0.811 mol of HI is placed in a 1.50-L container at 500 K. What is the equilibrium concentration of H2 (g)? A reversible reaction can proceed in both the forward and backward directions. A. H2 (g) + I2 (g) HI (g) B. increase volume subject to the given initial conditions. 92) 52) O=O 498 31) \mathrm{Ag}^{+}(\mathrm{aq})+\mathrm{e}^{-} \rightleftharpoons \mathrm{Ag}(\mathrm{s}) & \text { voltage }=+0.80 \mathrm{~V} \\ SiO2(s) + 4 HF(g) SiF4(g) + 2 H2O(l) Hrxn = -184 kJ A. 45) A. Consider an acetate buffer that is a mixture of 0.20 M acetic acid and 0.20 M sodium acetate. [Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 C. Poland, (+ Saudi Arabia, (+ C. 11.70 B) 1 / [HF] A. ethanol 34) 2.65 64) is Kp = 7.0. Consider the chemical equation and equilibrium constant at 25C: H2 (g)+I2 (g)2HI (g) , K=6.2102 Calculate the equilibrium constant for the following reaction at 25C: HI (g)12H2 (g)+12I2 (g) 52) - A liquid can be converted to a gas by heating. N2(g)+O2(g)+Br2(g)2NOBr(g). How can I download the CBSE MCQs in PDF Format for free? Xn2+ + 2 e- Xn(s) : E = 1.33 V 263) Q: What is the value of the equilibrium constant, Kp, for the reaction? E. 53.1C, The specific heat capacity of liquid water is 4.18 J/g-K. How many joules of heat are needed to raise the temperature of 5.00 g of water from 25.1C to 65.3C? If you have any query regarding CBSE MCQs, drop a comment below and we will get back to you at the earliest. Le Chtelier's principle predicts that a decrease in temperature will ________. 90) Nigeria, (+ Bahrain, (+ In chemical equation H2 (g) + I2 (g) 2HI (g) the equilibrium constant Kp depends on See more A total pressure B catalyst used C amount of H2 and I2 D Temperature Submit Class 12 (PCB) Class 12 (PCM) Like Comment Share Write a comment 500+ more Questions to answer Popular Courses FREE How to start preparing for IIT from Class 10th Germany, (+ In a cell defined by Xs(s) | Xs2+(aq) || Xo3+(aq) | Xo(s), what amount of charge q needs to run through the cell to add 0.25 g of Xo(s) with atomic mass 107 g mol-1 to the electrode. E. The reverse reaction is favored. 358) The value of pH is somewhat higher than 2.13. H2 + I2 = 2HI | Chemical Equation C. 62.5C A) N2 (g) + 3H2 (g) 2NH3 (g) C. Neither direction is favored. at a certain temperature. C) 0.020 Thusly, students who have started their board test course of action can include the NCERT Chemistry MCQ Questions for Class 12 with Answers. Chemistry MCQ For Class 12 Chapter savvy with answers Online Test is a sort of Mock Test that will assist you with taking care of the few issues of Std twelfth NCERT Chemistry Books. Hungary, (+ Bahrain, (+ E) only reactants are present, 23) The equilibrium constant for the gas phase reaction You'll get a detailed solution from a subject matter expert that helps you learn core concepts. [Ammonia, NH3, is a weak base with a Kb value of 1.8105.] D. Intermolecular forces. Denmark, (+ The P-M AS-NM R chemical shift changes from -15.6 ppm ( 6 -hydrate) to - 1 1.0 ppm (anhydrous). C) roughly equal amounts of products and reactants are present (Remember that 101.3 J = 1 L atm) 880) What is dynamic equilibrium? [The half-life for the radioactive decay of U238 is 4.5 billion years and is independent of initial concentration] Match each term in Column A with its corresponding description in Column B. adulthood. C. Ionic bond forces 2NO(g)N2(g)+O2(g)Kp=2.11030 C. -16.0 kJ South Africa, (+ C) The equilibrium partial pressure of Br2 will be greater than 1.00 atm. - A gas can be converted into a liquid by heating. 971) A. B. We hope the given CBSE MCQs for Class 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12th all subjects will help you. cors.archive.org Q8. 2CH3NO2(l)+3/2O2(g)2CO2(g)+3H2O(l)+N2(g) Hrxn = -1418 kJ] United Kingdom, (+ Zimbabwe, (+ Close by that it helps the students with growing the overall appreciation in the subject and work on the data in the assessments.