in chemical equation h2+i2=2hi the equilibrium constant kp depends on
The value of pH is somewhat higher than 6.65. Identify the change that will always shift the equilibrium to the right. A. ion-ion Q: How long will it take for 15% of the U238 atoms in a sample of U238 to decay? - 1.92 x 103 kJ/mole E) an increase in total pressure by the addition of helium gas (V and T constant), B) a decrease in the total pressure (T constant), 33) Consider the following reaction at equilibrium: D. 4.60. D. H3PO4 From Midterm 3: A2B(g) + B(g) A2B2(g) Kc = 16.4 - A liquid can be converted to a gas by heating. Let us consider that one mole of H2 and one mole of I2 are present initially in a vessel of volume V dm3. B) H2 (g) + Cl2 (g) 2 HCl (g) From Midterm 3: at a certain temperature. C. 1-pentanol D. 1.72 J/(g C), The temperature rises from 25.00C to 29.00C in a bomb calorimeter when 3.50 g of sucrose undergoes combustion in a bomb calorimeter. B. removing O2 Click to share on Facebook (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on LinkedIn (Opens in new window), Click to share on Reddit (Opens in new window), Click to share on Tumblr (Opens in new window), Click to share on Pinterest (Opens in new window), Click to share on Pocket (Opens in new window), Click to share on Telegram (Opens in new window), Click to share on Skype (Opens in new window), Click to share on WhatsApp (Opens in new window), General Principles and Processes of Isolation of Elements Class 12 MCQ Questions, The p-Block Elements Class 12 MCQ Questions, The d-and f-Block Elements Class 12 MCQ Questions, Coordination Compounds Class 12 MCQ Questions, Haloalkanes and Haloarenes Class 12 MCQ Questions, MCQ Questions for Class 12 Chemistry Chapter 1 The Solid State with Answers, MCQ Questions for Class 12 Chemistry Chapter 2 Solutions with Answers, MCQ Questions for Class 12 Chemistry Chapter 3 Electrochemistry with Answers, MCQ Questions for Class 12 Chemistry Chapter 5 Surface Chemistry with Answers, MCQ Questions for Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements with Answers, MCQ Questions for Class 12 Chemistry Chapter 7 The p-Block Elements with Answers, MCQ Questions for Class 12 Chemistry Chapter 8 The d-and f-Block Elements with Answers, MCQ Questions for Class 12 Chemistry Chapter 9 Coordination Compounds with Answers, MCQ Questions for Class 12 Chemistry Chapter 10 Haloalkanes and Haloarenes with Answers, Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download. A) [H+][HCO3-] / [CO2] A) some removal of from the reaction vessel (V and T constant) If the value for K = 2.1 X10-2 at 730 K, which substance predominates, HI or H2 and I2 B) 0.50 - The relationship between vapor pressure and temperature is linear. This multitude of MCQs with answers are delivered by subject specialists for a wide range of understudies. The formation of HI from H2 and I2 is an example of gaseous homogeneous equilibrium reaction. B.54.4 J Finland, (+ A. mmmmmmmH2 + mmlI2 mll2HI I/molL-1:ml1.000mm1.000mml1.000 C/molL-1:mm-xmmmll-xmmml+2x E/molL-1:m1.000-xm1.000-xm1.000+2x \mathrm{~Pb}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightleftharpoons \mathrm{Pb}(\mathrm{s}) & \text { voltage }=-0.13 \mathrm{~V} \\ 2) Which one of the following is true concerning the Haber process? Propane has a normal boiling point of 42.0C and a heat of vaporization (Hvap) of 19.04 kJ/mol. Spain, (+ E. There is not enough information to calculate the Kw. Use the bond energies provided to estimate Hrxn for the reaction below. Maldives, (+ Determine the value of the missing equilibrium constant. B. A) The reaction quotient must be satisfied for equilibrium to be achieved. 31) B. K=0 C) N2 (g) + 2O2 (g) 2NO2 (g) A. After equilibrium was reached, the partial pressure of NO dropped to 320 torr. H2 (g) + I2 (g)-- > < -- 2HI(g) H=-10.4 kJ. 855) 26) Which of the following statements is true? 1) C. The value of pH is 6.65. A) the quantities of reactants and . A. 92) - The vapor pressure of a liquid decreases with increasing temperature. 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] C. The bonds that break and those that form are of approximately the same strength. Belgium, (+ Q: Find the value of the [H3O+] of rain over the West Coast that has a pH of 5.5. Q2. A. E) only reactants are present, 24) The equilibrium constant for the gas phase reaction D. - 1.23 x 103 kJ/mole. [A solution contains a mixture of pentane and hexane at room temperature. 48) After 203 s the concentration of A had fallen to one fifth of the initial value. 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. 2NH3 (g) N2 (g) + 3H2 (g) D. increase reactant Solution Verified by Toppr Correct option is D) For the reaction, H 2(g)+I 2(g)2HI(g), the number of moles of gaseous reactants is equal to the number of moles of gaseous products. This equilibrium is an exothermic one. 6 H2(g) + 6 D2(g) 12 HD(g) Kc = ? A. adding SO3 H2(g) +I2(g) 2HI(g) Using the Equilibrium Constant (cont) E.g.2 For the reaction: PCl5(g) PCl3(g) + Cl2(g), Kc = 0.800 M at 340oC. E. 0.158. Utilizing the assets accessible you can score well in the test. 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. C) N2 (g) + 3H2 (g) 2 NH3 (g) Here's an example. d. Which metal ion in the list is the easiest to reduce? is first order in CH3NC. Equilibrium is when the rate of the forward reaction equals the rate of the reverse reaction. E. The reverse reaction is favored. 30.5 C D) 100 The equilibrium constant K will increase above 2.010-3 (answer is debatable), From Midterm Exam 2: Egypt, (+ A) N2O4 (g) 2NO2 (g) -25.5 kJ (NH4)2Se (s) 2NH3 (g) + H2Se (g) E. All of these have intermolecular forces stronger than dispersion. 49) 34) A(g) + 2B(g) AB2(g) Kc = 59 India, (+ 2A(g) + 2B(g) A2B2(g) Kc = 28.2. Which statement describes best the pH of a 0.010 M solution of this acid. 82) E) Q is the same as Keq when a reaction is at equilibrium. [Like all equilibrium constants, the value of Kw depends on temperature. What is the vapor pressure of propane at 25.0 C? Turkey, (+ B -423 We reviewed their content and use your feedback to keep the quality high. Test your critical thinking abilities by noting the Chemistry Multiple Choice Questions with Answers for Class 12 PDF all alone. Portugal, (+ Nepal, (+ 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. Check all that apply. 233) 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. It will assist you with knowing regardless of whether your arrangement is continuing the correct way. D. +653 J mol-1 B) a decrease in the total pressure (T constant) 971) Kc depends on how the chemical equation is written, but not on how the reaction is carried out. D) at low temperature and high pressure Additionally, you can reconsider all Chemistry sections appropriately whenever and save significant season of yours during class tests and yearly tests readiness. with forward (A P) rate constant k and reverse (A P) rate constant k' is correct? When the equilibrium constant is written with the gases in terms of partial pressure, the equilibrium constant is written as the symbol K_\text p K p. The subscript p stands for penguins. Provide your answer in units of mol L-1. You can utilize the quick links on our page to view or download the CBSE MCQs of all classes in an easy way. Bangladesh, (+ From Midterm 3: (i) The value of K increases as the system approaches equilibrium. By clicking Agree & join, you agree to the Study24x7 C. dipole-dipole B. E. In equilibrium, the ratio [P] / [A] is equal to k / k'. At body temperature (37C), Kw=2.41014] Bahrain, (+ E) -50, 14) Given the following reaction at equilibrium, if Kc = 1.90 1019 at 25.0 C, Kp = ________. United Arab Emirates, (+ From Midterm 3: Bangladesh, (+ Write an equilibrium constant expression b. Q: If the initial concentration of SO2Cl2 is 1.00 M, how long will it take for the concentration to decrease to 0.72 M ? HF (aq) + H2O (l) H3O+ (aq) + F- (aq) B. 0.269 995) D. 40.5C Q: What is the value of the equilibrium constant, Kp, for the reaction? For example, for the following equilibrium: H2(g) + I2(g) 2 HI(g); For . Q: If a reaction mixture is initially 0.20 M in X, what is the concentration of X after 151 seconds? United Arab Emirates, (+ 4CuO (s) + CH4 (g) CO2 (g) + 4Cu (s) + 2H2O (g), 20) The equilibrium-constant expression for the reaction B) increase the partial pressure of CO2 (g) 44) 27) Bahrain, (+ 2A(g) + B(g) A2B(g) Kc = ? 4.19 855) A. B. D. 6.36 torr At equilibrium, ________. Assuming that no heat is lost to the surroundings, what will the final temperature of the system be? Moreover very advantageous for the promising new kids in town have completed their outline for the term 1 test 2021-22. 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. C. -2.97C C) [H3O+][F-] / [HF][H2O] C) roughly equal amounts of products and reactants are present C) 7.07 C. 55.8 C 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. 351) Part B: If the butane is warmed to 25 C, how much liquid butane is present? B. 973) A. Saudi Arabia, (+ B. Zimbabwe, (+ Determine the value of . Propane has a normal boiling point of 42.0C and a heat of vaporization (Hvap) of 19.04 kJ/mol. 2 NO(g) + O2(g) 2 NO2(g) Hrxn = ? 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. D.2.08 10-2 J A. E) The reaction is at equilibrium when Q = Keq. Isotonic saline solution, which has the same osomotic pressure as blood, can be prepared by dissolving 0.923 g of NaCl in enough water to produce 100. mL of solution. Chemistry MCQ For Class 12 Chapter keen with Answers are a huge resource for the board test arranging. (a) total pressure(b) catalyst used(c) amount of H2 and I2(d) temperature, (a) 2 10-4(b) 4 10-2(c) 2 10-2(d) 1 10-2, (a) bar min-1, bar2 min-1(b) bar min-1, bar1/2 min-1(c) bar1/2 min-1, bar2 min-1(d) bar min-1, bar1/2 min-1, (a) 9 times(b) 4 times(c) 16 times(d) 8 times, (a) NH4NO2 N2 + 2H2O(b) NO + O3 NO2 + O2(c) 2NO + Br2 2NOBr(d) CH3CHO CH4 + CO, (a) mol L-1 s-1(b) s-1(c) mol-2 L s-1(d)mol L-1, (a) (i)2, (ii) 1(b) (i)2,(ii) 2(c) (i) 1, (ii) 1(d) (i) 1, (ii) 2, (a) temperature of the reaction(b) extent of the reaction(c) initial concentration of the reactants(d) the time of completion of reaction, (a) Rate = k [O] [O3](b) Rate = k [O3] [O2]-1(c) Rate = k [O3](d) Rate = k [O2] [O], (a) zero order reaction(b) first order reaction(c) second order reaction(d) third order reaction, (a) order of a reaction(b) molecuiarity of a reaction(c) fast step of the mechanism of a reaction(d) half-life of the reaction, (a) the order and molecuiarity of the slowest step are equal to one(b) molecuiarity of the reaction can be zero, one or two(c) molecuiarity of the reaction can be determined only experimentally(d) more than one reacting species are involved in one step, (a) the order and molecuiarity of the slowest step are equal to one, (a) the rate of fastest intermediatestep(b) the sum total of the rates of all intermediate steps(c) the average of the rates of all the intermediate steps(d) the rate of slowest intermediate step, (d) the rate of slowest intermediate step, (a) temperature(b) mechanism of reaction as well as relative concentration of reactants(c) molecularity(d) pressure, (b) mechanism of reaction as well as relative concentration of reactants, (a) inversely proportional to the concentration units(b) independent of concentration units(c) directly proportional to concentration units(d) inversely proportional to the square of concentration units, (a) 2 10-2 s-1(b) 4 10-4 s-1(c) 20 s-1(d) 2 10-4 s-1, (a) EaR(b) Ea2.303R(c) 2.303Ea.R(d) Ea2.303, (a) mol L-1s-1(b) s-1(c) L mol-1s-1(d) L2mol-2s-1, (a) triple(b) increase by a factor of 4(c) double(d) remain unchanged. Explain this phenomenon, keeping in mind that sound is reflected from the surface of the water and that the temperature of the air just above the water's surface is usually less than that at a height of 10m10 \mathrm{~m}10m or 20m20 \mathrm{~m}20m above the water. Guinea, (+ D. 12.9 kJ 34) H2 (g) + I2 (g) <------------------> 2 HI (g) 995) A) products predominate Exams . Ukraine, (+ The reaction mixture will contain [A]=0.1M and [B]=1.0M. 355) A) Q does not change with temperature. Consider an acetate buffer that is a mixture of 0.20 M acetic acid and 0.20 M sodium acetate. D. -150. kJ 92) 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. Oman, (+ A. Note: Names of real elements have been changed to 'Xd'. Phenomenon after H2 (hydrogen) reacts with I2 (iodine) This equation does not have any specific information about phenomenon. C. 16.6 kJ 992) A. For the comforts of the understudies we have furnished the part savvy Chemistry MCQs with replies here. To score well take a stab at rehearsing the rundown of Multiple Choice Type Questions gave in the connections underneath. D. SiF4 6) The equilibrium-constant expression depends on the ________ of the reaction. 5) Which of the following expressions is the correct equilibrium-constant expression for the following reaction? 45) C) 5.4 1013 Assume excess SiO2. Q6. What is the boiling point of water at an elevation of 1.00104 ft ? 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. 348) From Midterm Exam 2: HI(g)12H2(g)+12I2(g), The equilibrium constant is given for one of the reactions below. Coming up next are not many significant advantages of CBSE MCQs with Answers for Class 12 Chemistry distributed by cbseMCQ.com: Q1. Calculate the standard cell potential, Ecell, for the cell defined by the reaction 380) CH3NC(g) CH3CN(g) A. A. F2 7154 The pH of a solution of boric acid, H3BO3(aq), with Ka = 5.410-10 has been found to have a value of 5.02. Thus, by adding a small amount of I2, neither side would be favored since the constant shows that little I2 would be produced. The forward reaction is favored. Sweden, (+ Determine the value of the missing equilibrium constant. B. CP is always at a higher temperature relative to TP. NCERT Solutions and CBSE MCQs will provide you an in-depth understanding of all the questions and concepts in NCERT Textbooks. 100 27) How is the reaction quotient used to determine whether a system is at equilibrium? 1.00 10-14 is Keq = 230 at 300 C. E) none of the above, 15) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? A. What is the hydronium ion concentration of a 0.150 M hypochlorous acid solution with K a = 3.5 10-8? C. 62.5C B. hydrogen bonding France, (+ Q: What is the [H3O+] in pure water at body temperature? Thank you for your participation! In a particular experiment, the partial pressures of H 2 and I 2 Xx+(aq) + e-(aq) Xx(s) , The P-M AS-NM R chemical shift changes from -15.6 ppm ( 6 -hydrate) to - 1 1.0 ppm (anhydrous). 268) Equilibrium hydrogen is defined as a sample of hydrogen existing at the equilibrium ratio of orthohydrogen-parahydrogen at a given temperature (shown by the crimson dash-dot line in the figure). A) The equilibrium partial pressures of Br2, Cl2, and BrCl will be the same as the initial values. Nepal, (+ A. 263) B) reactants predominate C) The reaction is at equilibrium when Q < Keq. A) [SO3] / [SO2][O2] Switzerland, (+ Turkey, (+ E. Xe. Xs3+ + 3 e- Xs(s) : E = -0.55 V So Kp = (PH2) x (PI2) / PHI^2 P = partial pressure HC2H3O2 1.8105] ..Keq = 6.2 x 10^2 9.64 A. A) [HF][H2O] / [H3O+][F-] Which of the following statements is correct for the triple point (TP) and critical point (CP) of a material. CH3Cl(g)+Cl2(g)CH2Cl2(g)+HCl(g), H=105.8 kJ, Use the standard reaction enthalpies given below to determine Hrxn for the following reaction: N2(g) + O2(g) 2 NO(g) Hrxn = +183 kJ Which of the following statements is TRUE? 93) 45) 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. It is a common experience that on a calm, sunny day one can hear voices of persons in a boat over great distances. If you have any query regarding CBSE MCQs, drop a comment below and we will get back to you at the earliest. C) 0.020 Nepal, (+ What is the rate constant, k, for this reaction in units of L mol-1 s-1. but the same value of Kc will be obtained at a given temperature. A. South Korea, (+ Calculate the equilibrium constant for the following reaction at 25C: A. B. subject to the given initial conditions. H2 (g) + I2 (g) 2HI (g) H2(g)+I2(g)2HI(g) , K=6.2102 0.556 [A silver block, initially at 58.8 C, is submerged into 100.0 g of water at 25.0 C, in an insulated container. E) The reaction is at equilibrium when Q = Keq. corresponds to which redox cell reaction ? A -253 In each table, there may be one statement that is false because it contradicts the other three statements. Donald A. McQuarrie, Ethan B Gallogly, Peter A Rock, Edward Atkins, Julio de Paula, Peter Atkins. The amounts of H 2 and I 2 present D Temperature Medium Solution Verified by Toppr Correct option is D) The equilibrium constant does not change at all with changes in concentrations, volume, pressure, presence of catalyst, etc. B. C. 50.0 g Al, CAl = 0.903 J/gC Afghanistan, (+ The reaction mixture will contain [A]=1.0M and [B]=0.1M. Georgia, (+ [The reaction X products is second order in X and has a rate constant of 0.035 M1s1] Germany, (+ D. The value of pH is somewhat lower than 2.13. D. The value of pH is somewhat lower than 2.13. An equilibrium mixture contains 2 moles of sulphur dioxide, 1 mole of oxygen and 6 moles of sulphur trioxide. Cambodia, (+ (look up phase diagram). (Methanol ( CH3OH ) contains hydrogen directly bonded to oxygen, so it has hydrogen bonding. At equilibrium the total pressure in the container is 1.300 atm. Chemistry MCQ For Class 12 Chapter astute with answers PDF Download records are given here free of charge of cost. E. CP is always at a lower temperature relative to TP. What is dynamic equilibrium? Energy can be transferred in many ways, one of which is in the form of work. The molar mass of sugar is 342.3 g/mol. 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. Poland, (+ H2(g)+I2(g)2HI(g) , K=6.2102 Calculate the equilibrium constant 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 Each question has four options followed by the right answer. Rehearsing NCERT Online Chemistry Objective Questions For Class 12 Pdf Answers is perhaps the most ideal way to plan for the CBSE Class 12 board test. 351) B. C. The anomaly of carbon dioxide is that it has a CP but no TP. See Answer. Mauritius, (+ Q: Pb2+(aq)+Mg(s)Pb(s)+Mg2+(aq). Which one? From Midterm Exam 2: 8) The equilibrium expression for Kp for the reaction below is ________. \end{array} E. Xd + 2 H+ Xd2+ + H2. D. At any time, the ratio [P] / [A] is equal to k' / k. Poland, (+ The total volume will change to half of the initial value at 1 bar. E) [SO3] / [SO2][O2]2, 16) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? C. -16.0 kJ 2COF2(g)CO2(g)+CF4(g), Kc=6.30 224) A) at high temperature and high pressure For instance, it is used to make the refrigerant carbon tetrafluoride, CF4 via the reaction E. 1.62. The equilibrium mixture contained 1.37 10 2 M HI, 6.47 10 3 M H2, and 5.94 10 4 M I2. 49) New Zealand, (+ 355) Bond Bond Energy (kJ/mol) [An aqueous solution contains 32% HCl by mass] H2 (g) + I2 (g) HI (g) B) N2O4 (g) 2NO2 (g) Arsenic acid (H3AsO4) is a polyprotic acid with Ka1 = 5.510-3, Ka2 = 1.710-7, and Ka3 = 5.110-12. B) 1.9 10-14 Ghana, (+ 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. If you find. B. 2NO2 (g) 2NO (g) + O2 (g) 2 NO (g) N2 (g) + O2 (g). D) The reaction is at equilibrium when Q > Keq. Two liquids, labeled A and B, form an ideal mixture with total vapor pressure P = 324.4 torr at a certain composition. B. 2A+B2C+2D D. 173 g Maldives, (+ Part A: How much butane is present as a liquid at 22C? XaO4-(aq) + 4 H+(aq) + 3 e-(aq) XaO2(s) + 2 H2O(l) . Count the number of atoms of each element on each side of the equation and verify that all elements and electrons (if there are charges/ions) are balanced. Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. C. State functions do not depend on the path taken to arrive at a particular state. [Consider these two acids and their Ka values: 966) Hydrogen iodide can decompose into hydrogen and iodine gases. 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. [The heat of combustion of CH4 is 890.4 kJ/mol and the heat capacity of H2O is 75.2 J/molK] A compound is found to have a molar mass of 598 g/mol. [When 1 mol of a fuel is burned at constant pressure, it produces 3455 kJ of heat and does 12 kJ of work] [The decomposition of SO2Cl2 is first order in SO2Cl2 and has a rate constant of 1.46104 s1 at a certain temperature] D. 1.2 A. 10.9 kJ mol-1 Understudies who are getting ready for designing and clinical selection tests like NEET, IIT JEE, AIIMS, JIPMER and SAT Exams in Chemistry. 2.35 x 104 kJ/mole 07 H2(g) Nonmetal Gas 2 00 L container and goes to equilibrium at 200 oC 00 L container and goes to equilibrium at 200 oC. A2 (g) 2 A (g). Albania, (+ 32) 0.093 M Terms T&C. E. -1.35C. E. 8.89. Explain why chlorine occurs as diatomic molecules in nature rather than individual atoms. B. - The vapor pressure of a liquid increases with increasing temperature. - The vapor pressure of a liquid increases with increasing temperature. =1.33x10-3 M and [H+] = 1.33x10-3M The equilibrium constant, K eq, for the ionization of acetic acid at 25 C is _____. H2(g) + Br2(g) 2 HBr(g) Kc = 3.8 104 224) C) roughly equal amounts of products and reactants are present Qc = 0.120 < Kc reaction proceeds to products. 48.6 C - A liquid can be converted to a gas by heating. Where to download CBSE MCQs for all Classes and Subjects? You can likewise reconsider all Chemistry sections appropriately and save time during your group tests and tests. 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. B. 87.0C 348) A galvanic cell designated as B. From Midterm Exam 2: The best strategy to follow while answering the MCQ Questions for exams is to go through the question as many times as possible and understand it clearly. is Keq = 3.6 10-3 at 999 K. At equilibrium, ________. A. Switzerland, (+ 90) A. viscosity B. 1.14 J/(g C) 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: C. 5.25 J/(g C) 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? [An aqueous solution contains 32% HCl by mass] The isomerization of methylisonitrile to acetonitrile D) 5.66 10-3 880) Germany, (+ The heat capacity of the calorimeter is 4.90 kJ/C. United States, (+ Calculate the standard enthalpy change for the reaction When a reactio. Which of the following is TRUE if E sys = - 115 J? 2 SO2(g) + O2(g) 2 SO3(g) E) only reactants are present, 23) The equilibrium constant for the gas phase reaction 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] Br2 (g) + Cl2 (g) 2BrCl (g) 995) A) 100 A. ethanol What is the primary source of water stored in an aquifer? C. OH- Netherlands, (+ Determine the value of the missing equilibrium constant. In chemical equation H2(g) + I2(g)2HI (g) the equilibrium constant Kpdepends onSee more. What is the standard free energy change (Grxn) for this reaction? D. 13.16 D. 1-butanol Calculate Hrxn for the following reaction: [Ammonia, NH3, is a weak base with a Kb value of 1.8105.] Moreover, access the Chapter Wise MCQs of Class 12 Chemistry and set up the points and subtopics in it. h) A ask is sealed at 600 K 1with partial pressures of Hg = 2.50 atm and I g = 1.27.0 am. D) only products are present - A gas can be converted into a liquid by increasing the pressure of a gas sample. B) the rates of the forward and reverse reactions are equal. - A liquid can be converted to a gas by cooling. Given: (b)(b)(b) How much time does it take the crate to travel to the top of the ramp? H2(g)+I2(g)2HI(g) Which of the following statement is/are true? Afghanistan, (+ C. 1.28 2NH3 (g) N2 (g) + 3H2 (g) E. 48.1 J, [A 100-W lightbulb is placed in a cylinder equipped with a moveable piston. D. -0.91C B. C6H6 C-H 414 968) Swaziland, (+ +25.5 kJ H2(g) + I2(g) 2HI(g) At equilibrium, the mixture is found to contain 1.580 mole of HI. Georgia, (+ AB2(g) + B(g) AB3(g) Kc = ? C-O 360 (iii) The total pressure increases as the system approaches equilibrium. France, (+ . 992) The equilibrium constant (K ) would be __________. E) in the presence of solid carbon, 35) The effect of a catalyst on an equilibrium is to ________. Understudies who are planning for Central board assessments in Chemistry specifically CBSE, ICSE, and NIOS Board. Note: Names of real elements have been changed to 'Xx' and 'Xa'. 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.
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in chemical equation h2+i2=2hi the equilibrium constant kp depends on