in chemical equation h2+i2=2hi the equilibrium constant kp depends on

D) increase the rate at which equilibrium is achieved without changing the composition of the equilibrium mixture A. D) only products are present 12.72 What is the mole fraction xA of liquid A in this mixture. A. H2(g) Another example of a chemical equation that can be used to explain is given below: Equation: 2 S O 2 ( g) + O 2 ( g) 2 S O 3 ( g) Equilibrium Constant: K C = [ S O 3] 2 [ S O 2] 2 [ O 2] Moreover, in terms of finding equilibrium constant for gases, partial pressure is taken into account. E) only reactants are present, 24) The equilibrium constant for the gas phase reaction Ukraine, (+ 27) How is the reaction quotient used to determine whether a system is at equilibrium? United Kingdom, (+ A. A) decrease the partial pressure of O2 (g) Oman, (+ Students also can take a free test of the Multiple Choice Questions of Class 12 Chemistry. A. Q: If a reaction mixture is initially 0.20 M in X, what is the concentration of X after 151 seconds? B. 2HI (g) H2 (g) + I2 (g) Nepal, (+ A reaction of the type 2A P has the following rate law: rate = k[A]2. 348) H2 (g) + I2 (g) 2HI (g) What is the value of Keq for the following reaction? 855) C. The reciprocal concentration, [A]-1, changes linearly with time. Bahrain, (+ Q: What can you conclude about the equilibrium constant (K) for the reaction? D. CO C. Xd2+ + 2 H+ Xd + H2 Q: What is the mole fraction of hexane? B) N2O4 (g) 2NO2 (g) Terms T&C. [The half-life for the radioactive decay of U238 is 4.5 billion years and is independent of initial concentration] South Africa, (+ 5) Which of the following expressions is the correct equilibrium-constant expression for the following reaction? 27) Which of the following is TRUE if E sys = - 115 J? [An object can possess kinetic energy, the energy of motion, and/or potential energy, the energy of position. 992) - The relationship between vapor pressure and temperature is not linear, but rather, it is exponential. C. dipole-dipole N2(g)+O2(g)+Br2(g)2NOBr(g). Asked by sumandeesinghrana | 12 Oct, 2010, 03:00: PM Expert Answer Dear Student For the reaction H 2 + I 2 --------> 2HI Which statement is true of an endothermic reaction? Cambodia, (+ D. 32.2 kJ mol-1 34) Hydrogen and iodine react to form hydrogen iodide, like this: H_2 (g) + I_2 (g) rightarrow 2 HI (g) Also, a chemist finds that at a certain temperature the equilibrium mixture of hydrogen, iodine, and hydrogen iodide has the following composition: Calculate the value of the equilibrium constant K_p for this reaction. E) none of the above, 15) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? 37.5 g India, (+ Propane has a normal boiling point of 42.0C and a heat of vaporization (Hvap) of 19.04 kJ/mol. Which of the following statements is correct for the triple point (TP) and critical point (CP) of a material. E) [SO3] / [SO2][O2]2, 16) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? [Benzene has a heat of vaporization of 30.72 kJ/mol and a normal boiling point of 80.1 C] C. 0.037 A. Erxn can be determined using constant volume calorimetry. Relationships between chemical equations and the expressions of equilibrium constants The expression of equilibrium constant depends on how the equilibrium equation is written. D -511. - A gas can be converted into a liquid by cooling. For a chemical equilibrium reaction H2 (g) + I2 (g) 2HI(g) write an expression for Kp (and relate it to Kc). Calculate the standard enthalpy change for the reaction E. 0.371, From Midterm Exam 2: Note: Names of real elements have been changed to 'Xs' and 'Xo'. C) roughly equal amounts of products and reactants are present 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 -25.5 kJ If you have any queries regarding The Solid State CBSE Class 12 Chemistry MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon. - A liquid can be converted to a gas by cooling. Mauritius, (+ The enthalpy of a reaction can be calculated from the heats of formation of the substances involved in the reaction: Refer to the list of electrode potentials below to answer parts a to d. Ag+(aq)+eAg(s)voltage=+0.80VCo2+(aq)+2eCo(s)voltage=0.28VCu2+(aq)+2eCu(s)voltage=+0.34VPb2+(aq)+2ePb(s)voltage=0.13VZn2+(aq)+2eZn(s)voltage=0.76V\begin{array}{ll} Consider an acetate buffer that is a mixture of 0.20 M acetic acid and 0.20 M sodium acetate. C. 1.92 x 103 kJ/mole C) [SO3]2 / [SO2]2[O2] 100.0C If the value for K = 2.1 X10-2 at 730 K, which substance predominates, HI or H2 and I2 ), [A 100-W lightbulb is placed in a cylinder equipped with a moveable piston. B. H2SO3/HSO3- d. Which metal ion in the list is the easiest to reduce? E) -50, 13) The Keq for the equilibrium below is 50. D. The value of K remains, but the equilibrium is shifted towards more products. A galvanic cell designated as A) 5.26 10-20 380) B) [CO2] / [H+][HCO3-] 44) Equilibrium constant expression in terms of partial pressures South Korea, (+ A. From Midterm 3: Determine the value of . 31) 33) What is dynamic equilibrium? Saudi Arabia, (+ The specific heats of ice, water, and steam are 2.09 J/gK, 4.18 J/gK, and 1.84 J/gK, respectively. E. 9.40, A mixture containing 20.6 g of ice (at exactly 0.00 C) and 70.3 g of water (at 62.9 C) is placed in an insulated container. D. all of the above D.2.08 10-2 J - The vapor pressure of a liquid increases with increasing temperature. What is the value of Keq at this temperature for the following reaction? 4) Which of the following expressions is the correct equilibrium-constant expression for the equilibrium between dinitrogen tetroxide and nitrogen dioxide? E. 13.02, From Midterm Exam 2: Part A: Calculate the freezing point of a solution containing 12.2 g FeCl3 in 160 g water. At equilibrium, ________. E. dispersion. B) The equilibrium partial pressure of BrCl (g) will be 4.00 atm. The total volume will change to half of the initial value at 1 bar. E. increase pressure, The following reaction is exothermic. SiO2(s) + 4 HF(g) SiF4(g) + 2 H2O(l) Hrxn = -184 kJ E) -50, 14) Given the following reaction at equilibrium, if Kc = 1.90 1019 at 25.0 C, Kp = ________. Determine the value of the missing equilibrium constant. Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. What is the osmotic pressure of a solution made by dissolving 45.0 g of glucose, C6H12O6, in enough water to form 225.0 mL of solution at 36.0 C ? Spain, (+ 32) 268) Tap on the individual Chapter connection of twelfth Standard Chemistry you need to practice and profit the comparing points MCQ Quiz Questions. Note: Names of real elements have been changed to 'Xs' and 'Xo'. Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25 C. [The decomposition of SO2Cl2 is first order in SO2Cl2 and has a rate constant of 1.46104 s1 at a certain temperature] y+4y+5y=26e3t,y0=1,y0=5. 10) The Keq for the equilibrium below is 7.52 10-2 at 480.0 C. B. E. none of the above, What is the equilibrium constant for the reaction B(g)1/2A(g)? 4CuO (s) + CH4 (g) CO2 (g) + 4Cu (s) + 2H2O (g), 20) The equilibrium-constant expression for the reaction For the reaction : 2HI(g) H2 (g)+ I2 (g), the degree of dissociated () of HI(g) is related to equilibrium constant Kp by the expression: For the reaction H2(g) + I2(g) 2HI(g) the equilibrium constant kp changes with. 87.0C B. 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 0.21 M B. The equilibrium-constant expression depends on the _____ of the reaction. B. NCERT Exemplars are basically practice-books that contain additional questions of higher level and give you comprehensive and thorough learning. A) The reaction quotient must be satisfied for equilibrium to be achieved. The value of the equilibrium constant (Kp) as represented by the first chemical equation is 2.00 x 10-2 at 730 K. Calculate the value of the . 2CO2 (g) 2CO (g) + O2 (g) H = -514 kJ So Kp = (PH2) x (PI2) / PHI^2 P = partial pressure CBSE MCQs lay a stronger foundation of concepts in students that can be useful for them in their later stages to prepare for any competitive exams. D) 2 SO3 (g) 2 SO2 (g) + O2 (g) C) 1 / [(NH4)2Se] A(g) + 2B(g) AB2(g) Kc = 59 D) [SO3]2 / [SO2]2[O2]2 H2 (g) + I2 (g) <------------------> 2 HI (g) B. SiH4 E. 0.169 M, From Midterm Exam 2: Compute the pH at 25C after 3 mL of the base has been added. [An aqueous solution contains 32% HCl by mass] The forward reaction is favored. Maldives, (+ -333 kJ C. +873 J mol-1 D. TP and CP are always at the same pressure. D. 0.087 The value of pH is somewhat higher than 2.13. Finland, (+ A. From Midterm 3: B. HOCl(aq) + H2O(l) H3O+(aq) + OCl-(aq). 12.30 See Answer. VITEEE 2007: For the reaction H 2( g )+ I 2( g ) longrightarrow 2 HI ( g ), the equilibrium constant Kp changes with (A) total pressure (B) catalyst (VITEEE 2007: For the reaction H 2( g )+ I 2( g ) longrightarrow 2 HI ( g ), the equilibrium constant Kp changes with (A) total pressure (B) catalyst (Tardigrade - CET NEET JEE Exam App. O=O 498 Sweden, (+ 92) A) The equilibrium partial pressures of Br2, Cl2, and BrCl will be the same as the initial values. 7154 7) Q3. 0.093 M (iii) The total pressure increases as the system approaches equilibrium. Check all that apply. 17.9 A homogeneous equilibrium reaction exists when all the components of the reaction are in the same phase (i.e., gas, liquid, solid, aqueous). What is the vapor pressure of propane at 20.0 C? Using the equilibrium constant calculated in 2, calculate . 92) A) N2 (g) + 3H2 (g) 2NH3 (g) Portugal, (+ 966) - The relationship between vapor pressure and temperature is not linear, but rather, it is exponential. A) 25 B) Keq does not change with temperature, whereas Q is temperature dependent. Bahrain, (+ C) 0.020 Hungary, (+ C) [H3O+][F-] / [HF][H2O] 263) C. 22.1 kJ mol-1 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) 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) Write the overall balanced equation for the reaction. Coming up next are not many significant advantages of CBSE MCQs with Answers for Class 12 Chemistry distributed by cbseMCQ.com: Q1. 233) A) 5.4 10-13 H2 + I2 = 2 HI Since there is an equal number of each element in the reactants and products of H2 + I2 = 2HI, the equation is balanced. Understudies able to speed up and precision in settling these inquiries are expected to rehearse however much as could be expected. What is the standard free energy change (Grxn) for this reaction? D. ion-dipole For benzoic acid, Ka=6.5105. The people who need to get the passing marks in the CBSE class twelfth board test can use the Chemistry Multiple choice requests to practice. 64) A. E. In equilibrium, the ratio [P] / [A] is equal to k / k'. D. 5.50 10-14 2 NO(g) + O2(g) ' 2 NO2(g) A. All the Solutions are explained in a comprehensive manner and are recommended by many subject experts. Use Q to determine which of the statements below is true. 7.2 10-5 M Q: Assuming ideal behavior, what is the concentration of the solute within the solution in mole percent? The rate constant for the reaction is 9.45 10-5 s-1 at 478 K. The half-life of the reaction when the initial [CH3NC] is 0.030 M is ________ s. From Midterm 3: F 2100 universal tv remote manual ethanol is capable of forming hydrogen bonds with water good breakfast cereal for type 2 diabetes naturally with diet Of the three basic states of matter, the particles in gas are much . (Assume ideal behavior.). [Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 C. Afghanistan, (+ D. The value of pH is somewhat lower than 2.13. South Korea, (+ 41) A. Where to download CBSE MCQs for all Classes and Subjects? C) N2 (g) + 3H2 (g) 2 NH3 (g) [The reaction X products is second order in X and has a rate constant of 0.035 M1s1] You can likewise reconsider all Chemistry sections appropriately and save time during your group tests and tests. How can I download the CBSE MCQs in PDF Format for free? In a particular experiment, the partial pressures of H 2 and I 2 1/2 N2(g) + O2(g) NO2(g) Hrxn = +33 kJ B. [Nitromethane (CH3NO2) burns in air to produce significant amounts of heat. NO(g)+12Br2(g)NOBr(g)Kp=5.3 Use the above-provided NCERT MCQ Questions for Class 12 Chemistry with Answers Pdf free download. Q: Calculate the [H3O+] of this rain. Q: At what temperature does benzene boil when the external pressure is 460 torr ? The gases react to form l-l] according to the equation above. Ukraine, (+ B) [(NH4)2Se] / [NH3]2[H2Se] [The total change in internal energy is the sum of the heat, q, and work, w: E=q+w] the sign of E for the system: negative (-) = The system expands and the surroundings get hotter positive (+) = The system contracts and the surroundings get colder Which of the following is TRUE if E sys = - 115 J? A. B. New Zealand, (+ E. methanol, Give the major force between ethanol and water. Egypt, (+ with forward (A P) rate constant k and reverse (A P) rate constant k' is correct? Oman, (+ (+ Based on the freezing point depression constant for water, Kf = 1.86 K /(mol kg-1), what is the freezing temperature of the mixture. E) all of the above, 32) Consider the following reaction at equilibrium: Determine the partial pressure of each gas at equilibrium. A. A) the quantities of reactants and . Assuming that no heat is lost to the surroundings, what will the final temperature of the system be? 57.0 kJ at a certain temperature. 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. E) [H+][HCO3-], 18) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? E. -1.35C. 351) is Keq = 4.34 10-3 at 300 C. What is the boiling point of water at an elevation of 1.00104 ft ? Part A: What is the value of E for the combustion of the fuel? Chemistry MCQ For Class 12 Chapter astute with answers PDF Download records are given here free of charge of cost. C. surface tension D. 25.0 g granite, Cgranite = 0.79 J/gC D. 6.36 torr C. H3O+/OH- A. B. It changes only with changes in temperature of the system. Phenomenon after H2 (hydrogen) reacts with I2 (iodine) This equation does not have any specific information about phenomenon. The concentration [A] was measured at two different times: at t1 = 19.4 s the concentration of A was [A]1 = 0.62 M and at time t2 = 60.8 s the result was [A]2 = 0.31 -69.8 J mol-1 995) 0.13 M C. 4.3 M D. 0.039 M 26) Which of the following statements is true? B. Hrxn can be determined using constant pressure calorimetry. C) 7.07 To have a decent groundwork for your impending board test then you should endeavor these internet based tests for Chemistry. You can utilize the quick links on our page to view or download the CBSE MCQs of all classes in an easy way. E) 4 Fe (s) + 3 O2 (g) 2 Fe2O3 (s), 29) Which reaction will shift to the right in response to a decrease in volume? H2(g)+I2(g)2HI(g) Which of the following statement is/are true? The isomerization of methylisonitrile to acetonitrile H2(g)+I2(g)2HI(g) , K=6.2102 960) Determine the value of the missing equilibrium constant. 2.65 The equation for the dissociation of hypochlorous acid is: B. C6H6 To calculate Kp, you first need to know the partial pressures of each gas in a mixture, then you simply put the partial pressure values into the equation you worked out earlier. Part B: What is the value of H for the combustion of the fuel? Weak bonds break and strong bonds form. For example, for the following equilibrium: H2(g) + I2(g) 2 HI(g); For . B) 1.9 10-14 93) Guinea, (+ E) none of the above, 12) The Keq for the equilibrium below is 50. Nigeria, (+ This buffer has a pH = 4.74. Bangladesh, (+ 8) The equilibrium expression for Kp for the reaction below is ________. Q: What is the half-life for this reaction? Germany, (+ A) products predominate B) reactants predominate C. N(g) D. +653 J mol-1 Note: Names of real elements have been changed to 'Xx' and 'Xa'. D) a decrease in the total volume of the reaction vessel (T constant) Albania, (+ 32) (Methanol ( CH3OH ) contains hydrogen directly bonded to oxygen, so it has hydrogen bonding. At the same temperature, pure liquid A has a vapor pressure of 220 torr, while pure liquid B has a vapor pressure of 400 torr. 100 What is the specific heat of benzene? Carbonyl fluoride, COF2, is an important intermediate used in the production of fluorine-containing compounds. It is a common experience that on a calm, sunny day one can hear voices of persons in a boat over great distances. D) 100 Portugal, (+ Zimbabwe. \mathrm{Ag}^{+}(\mathrm{aq})+\mathrm{e}^{-} \rightleftharpoons \mathrm{Ag}(\mathrm{s}) & \text { voltage }=+0.80 \mathrm{~V} \\ Qc = 0.120 < Kc reaction proceeds to products. E. CP is always at a lower temperature relative to TP. 992) Chemistry MCQ For Class 12 Chapter astute with Answers PDF Download. -2.16C D) [CO2][H2O] / [H+][HCO3-] Q: What is the pH of a 0.240 M ammonia solution? After the reaction reaches equilibrium, the total pressure is 2.65 atm.] C. -2.97C See some more details on the topic What is the equilibrium expression for H2 I2 2HI? B. Turkey, (+ Calculate the equilibrium constant for the following reaction at 25C: When a reactio. The statements in the tables below are about two different chemical equilibria. 855) A. 2003-2023 Chegg Inc. All rights reserved. In this case, you just need to observe to see if product substance HI (hydroiodic acid), appearing at the end of the reaction. The formation of HI from H2 and I2 is an example of gaseous homogeneous equilibrium reaction. A sample of NO gas was introduced into a container such that the initial partial pressure of NO was 560 torr. Sweden, (+ A B + C Netherlands, (+ Chemistry MCQ For Class 12 Chapter keen with Answers are a huge resource for the board test arranging. A) increase the rate of the forward reaction only Substance Hf (kJ/mol) Thank you for your participation! 93) D. Energy is neither created nor destroyed, excluding nuclear reactions. Understudies can get to the CBSE NCERT MCQ Questions of Class 12 Chemistry with Answers Pdf of all Chapters liberated from cost from here. system remains constant during its change from Examples:- (i) H2(g) + I2(g) 2HI(g) the initial to final state. Donald A. McQuarrie, Ethan B Gallogly, Peter A Rock, Edward Atkins, Julio de Paula, Peter Atkins. What would the molar concentration of the tree sap have to be to achieve this pressure on a day when the temperature is 31 C ? D. SiF4 A. Determine the value of the missing equilibrium constant. C. 3.42 torr 2 SO2(g) + O2(g) 2 SO3(g) D. 12.79 Use the following reactions and given H values. Experts are tested by Chegg as specialists in their subject area. 380) [An aqueous solution contains 32% HCl by mass] CH4(g)+Cl2(g)CH3Cl(g)+HCl(g), H=99.60 kJ These various decision inquiries for twelfth class Chemistry will help you to improve calculated and subject information abilities. If the temperature is raised, then the forward reaction is favored. 973) [A silver block, initially at 58.8 C, is submerged into 100.0 g of water at 25.0 C, in an insulated container. (Assume that the cylinder and lightbulb assembly comprise the system and assume two significant figures. AB2(g) + B(g) AB3(g) Kc = ? B. hydrogen bonding What is the osmotic pressure of this solution at 25 C? After 203 s the concentration of A had fallen to one fifth of the initial value. Russia, (+ New Zealand, (+ C. 50.0 g Al, CAl = 0.903 J/gC (Hint: Start with calculating the pH as if this were a monoprotic acid.) B) [SO2] / [SO3] View Answer Consider the following reaction: 2SO (g) + O_2 (g) to 2SO_2 (g) K_p = 36.4 at 298 K. In a reaction mixture at equilibrium, the partial pressure of SO is 0.46 atm and that of SO_2 is. B) H2 (g) + Cl2 (g) 2 HCl (g) Yes, our website is the one-stop search for all CBSE Board Examination related sources like questions papers, syllabus, exam pattern, sample papers, and Multiple choice questions papers. 995) Utilizing the assets accessible you can score well in the test. 355) C. Neither direction is favored.