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

52) B. NaCl A reversible reaction can proceed in both the forward and backward directions. E. 0.158. Additionally, the Online Multiple decision questions will give you certainty to show up in the board test and take care of the complicated issues quicker. Turkey, (+ -25.5 kJ 31) NO(g)+12Br2(g)NOBr(g)Kp=5.3 B. H2 (g) + I2 (g) 2HI (g) What is the value of Keq for the following reaction? This reaction has been started at time t = 0 with an initial concentration of [A]0 = 0.3 M, with a half-life t1/2 = 131 s. What concentration of A is present at time t = 258 s ? 2) Which one of the following is true concerning the Haber process? The forward reaction is favored. B. removing O2 h) A ask is sealed at 600 K 1with partial pressures of Hg = 2.50 atm and I g = 1.27.0 am. Coming up next are not many significant advantages of CBSE MCQs with Answers for Class 12 Chemistry distributed by cbseMCQ.com: Q1. 3) Which one of the following will change the value of an equilibrium constant? A. is Keq = 4.34 10-3 at 300 C. C) N2 (g) + 2O2 (g) 2NO2 (g) 263) 880) 224) 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] India, (+ 977) For these conditions, what is the value of Kp for the reaction that occurred: A. 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? 2A(g) + 2B(g) A2B2(g) Kc = 28.2. Download the Study24x7 App, so you can connect and collaborate. D. 456 kJ 966) E) in the presence of solid carbon, 35) The effect of a catalyst on an equilibrium is to ________. D. 25.0 g granite, Cgranite = 0.79 J/gC E) [SO3] / [SO2][O2]2, 16) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? Determine the partial pressure of each gas at equilibrium. 2.30 When a liquid evaporates in a closed container, molecules with relatively higher kinetic energy escape the liquid surface into the vapour phase and number of liquid molecules from the vapour phase strike the liquid surface and are retained in the liquid phase. A) Q does not change with temperature. 31) - A liquid can be converted to a gas by heating. Weak bonds break and strong bonds form. H2 (g) + I2 (g)-- > < -- 2HI(g) H=-10.4 kJ. Turkey, (+ A) [SO3] / [SO2][O2] Nepal, (+ B. increase volume Let's flip the above reaction. - The vapor pressure of a liquid decreases with increasing temperature. C) N2 (g) + 2O2 (g) 2NO2 (g) Equilibrium constant expression in terms of partial pressures 2HI(g); Equilibrium is the exact balancing of two opposing processes. A. Sweden, (+ 2 Xs(s) + 3 Xn2+(aq) 2 Xs3+(aq) + 3 Xn(s) . E. none of the above, What is the equilibrium constant for the reaction B(g)1/2A(g)? B. (iii) The total pressure increases as the system approaches equilibrium. Using the equilibrium constant calculated in 2, calculate . B. Calculate Hrxn for the following reaction: Denmark, (+ 2NO2 (g) 2NO (g) + O2 (g) Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students. C. dipole-dipole 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. 48) is Kp = 7.0. D) 2 SO3 (g) 2 SO2 (g) + O2 (g) 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. Mexico, (+ The total volume will change to half of the initial value at 1 bar. This buffer has a pH = 4.74. Use the bond energies provided to estimate Hrxn for the reaction below. C) roughly equal amounts of products and reactants are present C. The bonds that break and those that form are of approximately the same strength. Bangladesh, (+ 57.0 kJ B. C. The value of K remains, but the equilibrium is shifted towards more reactants. C) 7.07 B. If only COF2 is present initially at a concentration of 2.00 M, what concentration of COF2 remains at equilibrium? D. 0.087 Explain why chlorine occurs as diatomic molecules in nature rather than individual atoms. E. All of the above are conjugate acid-base pairs. Detailed description of the questions is given by subject experts and you can use them as a reference during your preparation. 25.0 g Ag, CAg = 0.235 J/gC B. Note: Names of real elements have been changed to 'Xs' and 'Xo'. H2 (g) + I2 (g) 2HI (g) Bahrain, (+ Part A: What is the value of E for the combustion of the fuel? Switzerland, (+ 92) B. CP is always at a higher temperature relative to TP. Portugal, (+ 41) Or if any of the following reactant substances I2 (iodine), disappearing What is the best strategy while answering the Multiple Choice Questions for exams? A. 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. Ghana, (+ (Assume that the cylinder and lightbulb assembly comprise the system and assume two significant figures. D. all of the above Test your critical thinking abilities by noting the Chemistry Multiple Choice Questions with Answers for Class 12 PDF all alone. B. B. Intramolecular forces A. 7.2 10-5 M Hungary, (+ The reaction mixture will contain [A]=1.0M and [B]=0.1M. You can get ready really for the Class 12 Chemistry Exam as they assist you with being comfortable with the sort of inquiries showing up in the test. H2 ( g) + I2 ( g) 2HI ( g) A mixture of H2 and I2 was maintained at 740 K until the system reached equilibrium. Note: Names of real elements have been changed to 'Xd'. D) 2N2 (g) + O2 (g) 2 O (g) [An aqueous solution contains 32% HCl by mass] 91) A. C) decrease the value of the equilibrium constant Zimbabwe, (+ From Midterm 3: A. 348) [An object can possess kinetic energy, the energy of motion, and/or potential energy, the energy of position. India, (+ Enter the email address you signed up with and we'll email you a reset link. C. K>1 28.4 kJ Chemistry MCQ For Class 12 Chapter keen with Answers are a huge resource for the board test arranging. 992) CBSE MCQs for all the classes and subjects are provided online or you can view them on our site. In a particular experiment, the partial pressures of H 2 and I 2 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. B. C6H6 B) reactants predominate 10) The Keq for the equilibrium below is 7.52 10-2 at 480.0 C. C) [H3O+][F-] / [HF][H2O] 7) D. 4.60. D) only products are present Part A: Calculate the freezing point of a solution containing 12.2 g FeCl3 in 160 g water. E. The value of pH is 2.13. Catalysts have no effect on equilibrium situations. 233) Part B: What is the value of H for the combustion of the fuel? 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) A) at high temperature and high pressure What is the stoichiometric coefficient of Xx(s) in the balanced reaction equation for that cell ? Xx+(aq) + e-(aq) Xx(s) , If you have any query regarding CBSE MCQs, drop a comment below and we will get back to you at the earliest. C. HF Russia, (+ What is the standard free energy change (Grxn) for this reaction? E) only reactants are present, 23) The equilibrium constant for the gas phase reaction The equilibrium constant expression for the reaction is Kc = [HI]2 [H2][I2] Substituting the equilibrium concentrations into the equilibrium expression, Kc = (0.30)2 (0.012)(0.15) = 50 The magnitude of the equilibrium constant is 50 for the temperature at which the data was collected. C. +873 J mol-1 Propane has a normal boiling point of 42.0C and a heat of vaporization (Hvap) of 19.04 kJ/mol. C. CF4 Which of the following statements is correct for the triple point (TP) and critical point (CP) of a material. O-H 464 Mauritius, (+ 2 HD(g) H2(g) + D2(g) Kc = 0.28 D. 13.16 \end{array} See Answer. Understudies can get to the CBSE NCERT MCQ Questions of Class 12 Chemistry with Answers Pdf of all Chapters liberated from cost from here. E. -24.5 kJ, Calculate the amount of heat (in kJ) required to raise the temperature of a 79.0 g sample of ethanol from 298.0 K to 385.0 K. The specific heat capacity of ethanol is 2.42 J/gC. Phenomenon after H2 (hydrogen) reacts with I2 (iodine) This equation does not have any specific information about phenomenon. Spain, (+ B) the rates of the forward and reverse reactions are equal. New Zealand, (+ Cambodia, (+ Netherlands, (+ \mathrm{Cu}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightleftharpoons \mathrm{Cu}(\mathrm{s}) & \text { voltage }=+0.34 \mathrm{~V} \\ A 20.0kg20.0 \mathrm{~kg}20.0kg crate sits at rest at the bottom of a 15.0m15.0 \mathrm{~m}15.0m long ramp that is inclined at 34.034.0^{\circ}34.0 above the horizontal. Egypt, (+ D -511. The equilibrium constant (Kp) for the interconversion of PCl5 and PCl3 is 0.0121: PCl5 (g) PCl3 (g) + Cl2 (g) . Comprehend the ideas and practice Objective Type Questions for twelfth Class Chemistry however much you can to score well. [The heat of combustion of CH4 is 890.4 kJ/mol and the heat capacity of H2O is 75.2 J/molK] 971) Hungary, (+ B) [SO2] / [SO3] E) -50, 14) Given the following reaction at equilibrium, if Kc = 1.90 1019 at 25.0 C, Kp = ________. H2(g)+I2(g)2HI(g) , K=6.2102 Calculate the equilibrium constant C. +115 kJ This problem has been solved! How is vapor pressure related to temperature? The vapor pressure of a certain sample has been measured at two different temperatures and the results are P1 = 160 kPa at T1 = 240 K and P2 = 840 kPa at T2 = 270 K. Determine the molar vaporization enthalpy, Hvap, from these results. Note: Names of real elements have been changed to 'Xx' and 'Xa'. Belgium, (+ C) 5.4 1013 Both TP and CP are located on the solid/liquid phase boundary. Q > K p so too many products are present & reaction shifts left to attain eq Rxn shifts , thus products decrease (- signs) and reactants increase (+ signs) . Chemistry MCQ For Class 12 Chapter astute with answers PDF Download records are given here free of charge of cost. [Seriously? One of these substances is a liquid at room temperature. D. 32.2 kJ mol-1 Ukraine, (+ B) at high temperature and low pressure D.2.08 10-2 J D. Intermolecular forces. If 35.8 mg of the compound is dissolved in enough water to make 175 mL of solution at 25C, what is the osmotic pressure of the resulting solution? C) roughly equal amounts of products and reactants are present From Midterm Exam 2: [An aqueous solution contains 32% HCl by mass] +206 kJ France, (+ 93) 0.13 M C. 4.3 M D. 0.039 M United Kingdom, (+ 380) [The decomposition of SO2Cl2 is first order in SO2Cl2 and has a rate constant of 1.46104 s1 at a certain temperature] Bangladesh, (+ What is the primary source of water stored in an aquifer? France, (+ [Like all equilibrium constants, the value of Kw depends on temperature. 268) C. 12.28 12.72 32) Ukraine, (+ 1) 2 SO2(g) + O2(g) 2 SO3(g) 351) 33) H2(g) + Br2(g) 2 HBr(g) Kc = 3.8 104 D. 12.9 kJ E. There is not enough information to calculate the Kw. Germany, (+ C. 1.92 x 103 kJ/mole A) [NH3][H2Se] / [(NH4)2Se] 44) 2SO3 (g) 2SO2 (g) + O2 (g) 348) Determine the value of the missing equilibrium constant. Determine the pH value at 25C for a 0.062 M solution of a base that is 100% dissociated. y+4y+5y=26e3t,y0=1,y0=5. 82) There is not a viable replacement for steady practice whether one needs to comprehend an idea completely or one needs to score better. B) Keq does not change with temperature, whereas Q is temperature dependent. Switzerland, (+ By rehearsing more second Year Chemistry MCQs with Answers Pdf Download, understudies can work on their speed and exactness which can help them during their board test. Beside the PDF archive of Chemistry we are giving the electronic test which will help in everyday act of the Mathematical Problems. Utilizing the assets accessible you can score well in the test. Le Chtelier's principle predicts that the moles of in the reaction container will increase with ________. corresponds to which redox cell reaction ? B) The equilibrium partial pressure of BrCl (g) will be 4.00 atm. C) The equilibrium partial pressure of Br2 will be greater than 1.00 atm. B. K=0 E. -1.35C. CBSE Textbooks can be great to guide you for any exam and has detailed solutions for the questions. 230) 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. Q: How long will it take for the concentration of SO2Cl2 to decrease to 25% of its initial concentration? 10 B. The P-M AS-NM R chemical shift changes from -15.6 ppm ( 6 -hydrate) to - 1 1.0 ppm (anhydrous). E. All of the above are true. You will track down a rundown of Chapter wise MCQ Questions with Answers for CBSE Class 12 Chemistry here to start your planning. 64) D. - 1.23 x 103 kJ/mole. Pakistan, (+ A. ion-ion 90) While the crate is moving, the ramp exerts a constant frictional force on it that has magnitude 65.0N65.0 \mathrm{~N}65.0N. (a)(a)(a) What is the total work done on the crate during its motion from the bottom to the top of the ramp? A) products predominate [Acid rain over the Great Lakes has a pH of about 4.6.] Thank you for your participation! A2 (g) 2 A (g). Each question has four options followed by the right answer. -69.8 J mol-1 (i) The value of K increases as the system approaches equilibrium. - A gas can be converted into a liquid by cooling. . From Midterm Exam 2: 1 Answer Ernest Z. Dec 11, 2017 The equilibrium concentrations are: [H2] = [I2] = 0.681 mol/L [HI] = 2.362 mol/L Explanation: The balanced equation is H2 + I2 2HI Now, we can set up an ICE table. [Nickel and aluminum electrodes are used to build a galvanic cell. C) 6.44 105 E. 13.02, From Midterm Exam 2: 91) Part B: Calculate the boiling point of the solution above. At equilibrium the total pressure in the container is 1.300 atm. This equilibrium is an exothermic one. 92) XaO4-(aq) + 4 H+(aq) + 3 e-(aq) XaO2(s) + 2 H2O(l) . The Kc constant shows that the ratio of products to reactants is very small, indicating that a much higher concentration of reactants exists compared to the concentration of products. E. 0.169 M, From Midterm Exam 2: Hydrogen bonding is a strong intermolecular force that makes this substance a liquid at room temperature), Identify the term used to describe the ability of a liquid to flow against gravity up a narrow tube. When a reaction component is a gas, we can also express the amount of that chemical at equilibrium in terms of its partial pressure. At equilibrium, ________. Zimbabwe, (+ C. The reaction mixture will contain equal concentrations of A and B. 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. Thusly, students who have started their board test course of action can include the NCERT Chemistry MCQ Questions for Class 12 with Answers. 0.093 M A.1.89 103 J Understudies who are concentrating in CBSE, ICSE, IGCSE schools as well as different State Board schools. - The relationship between vapor pressure and temperature is not linear, but rather, it is exponential. Bangladesh, (+ 45) A) N2 (g) + 3H2 (g) 2NH3 (g) 971) Use the following reactions and given H values. C) slow the reverse reaction only C) 0.020 Understudies who are getting ready for designing and clinical selection tests like NEET, IIT JEE, AIIMS, JIPMER and SAT Exams in Chemistry. 960) D) 2HI (g) H2 (g) + I2 (g) 93) The equilibrium mixture contained 1.37 10 2 M HI, 6.47 10 3 M H2, and 5.94 10 4 M I2. D. TP and CP are always at the same pressure. A galvanic cell designated as C. 50.0 g Al, CAl = 0.903 J/gC A. Q: Pb2+(aq)+Mg(s)Pb(s)+Mg2+(aq). 2COF2(g)CO2(g)+CF4(g), Kc=6.30 46) 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 The reaction : N 2O4 2N O2 J & K CET 2018 8. E) shift the equilibrium to the right, D) increase the rate at which equilibrium is achieved without changing the composition of the equilibrium mixture, Chemistry: Chapter 13 Review: Properties of S, CHAPTER 17: ADDITIONAL ASPECTS OF AQUEOUS EQU. N2(g) + O2(g) 2 NO(g) Hrxn = +183 kJ D. Xd + H+ Xd2+ + H2 + Pt Egypt, (+ [Ammonia, NH3, is a weak base with a Kb value of 1.8105.] South Korea, (+ Which statement describes best the pH of a 0.010 M solution of this acid. HNO2 4.6104 [The vapor above an aqueous solution contains 17.9 mg water per liter at 25 C] B. CP is always at a higher temperature relative to TP. Poland, (+ A) products predominate [A redox reaction has an Ecell=1.00V] B. C=O 799 2SO2 (g) + O2 (g) 2SO3 (g) +25.5 kJ Georgia, (+ Hrxn = ? Based on the freezing point depression constant for water, Kf = 1.86 K /(mol kg-1), what is the freezing temperature of the mixture. Consider the following reactions,(a) H2(g) + I2(g) 2HI(g)(b) CaCO2(s) CaO(s) + CO2(g)(c) S(s) + 3F2(g) SF6(g), The value of Kc for the reaction 2HI (g) H2 (g) + I2 (g) is 1 10^4 At a given time, the composition of reaction mixture is. B) reactants predominate Write the overall balanced equation for the reaction. 8) The equilibrium expression for Kp for the reaction below is ________. Bond Bond Energy (kJ/mol) Which of the following is TRUE if E sys = - 115 J? 45) SiO2(s) + 4 HF(g) SiF4(g) + 2 H2O(l) Hrxn = -184 kJ Relationships between chemical equations and the expressions of equilibrium constants The expression of equilibrium constant depends on how the equilibrium equation is written. Ukraine, (+ Reaction rates but not the rate constants k and k' depend on temperature. Bahrain, (+ 11.90 C. Xd2+ + 2 H+ Xd + H2 Q: What is the value of the equilibrium constant, Kp, for the reaction? The law of ________ states that energy that can be neither created or destroyed. A compound is found to have a molar mass of 598 g/mol. E. Xe. 2A+B2C+2D E. 73.6 kJ, It takes 11.2 kJ of energy to raise the temperature of 145 g of benzene from 23.0C to 68.0C. C. Ionic bond forces - The vapor pressure of a liquid increases with increasing temperature. is Keq = 230 at 300 C. D. C2H3O2-/HC2H3O2 A. 0.81 Match each term in Column A with its corresponding description in Column B. adulthood. 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 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. Tajikistan, (+ C) The reaction is at equilibrium when Q < Keq. This multitude of MCQs with answers are delivered by subject specialists for a wide range of understudies. D) [SO3]2 / [SO2]2[O2]2 Egypt, (+ Qc = 0.120 < Kc reaction proceeds to products. How can I download the CBSE MCQs in PDF Format for free? The equilibrium constant K will increase above 2.010-3. For benzoic acid, Ka=6.5105. B.54.4 J Afghanistan, (+ Spain, (+ In chemical equation H2(g) + I2(g) 2HI (g), the equilibrium Kp depends on (a) total pressure (b) catalyst used (c) amount of H2 and I2 (d) temperature class-12 Please log in or register to answer this question. 971) United States, (+ Q8. 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.