What is the value of Keq for the following reaction? 224) C. 16.6 kJ XaO4-(aq) + 4 H+(aq) + 3 e-(aq) XaO2(s) + 2 H2O(l) . 6.41 Guinea, (+ We hope the given NCERT MCQ Questions for Class 12 Chemistry PDF Free Download will definitely yield fruitful results. B. Hrxn can be determined using constant pressure calorimetry. The equation for the dissociation of hypochlorous acid is: 33) Zimbabwe, (+ is Keq = 2.80 102 at 999 K. At equilibrium, ________. B) the rates of the forward and reverse reactions are equal. Moreover very advantageous for the promising new kids in town have completed their outline for the term 1 test 2021-22. 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? B. E) [H+][HCO3-], 18) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? A. Oman, (+ 33) Both TP and CP are located on the solid/liquid phase boundary. 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. 2 Xs(s) + 3 Xn2+(aq) 2 Xs3+(aq) + 3 Xn(s) . Afghanistan, (+ Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. 93) Part B: What is the value of H for the combustion of the fuel? 2HI(g); Equilibrium is the exact balancing of two opposing processes. What is the mole fraction xA of liquid A in this mixture. The equilibrium-constant expression depends on the _____ of the reaction. H2 (g) + I2 (g)-- > < -- 2HI(g) H=-10.4 kJ. Bahrain, (+ 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. C. K>1 880) B) [CO2] / [H+][HCO3-] The symbols have their usual meaning, for example AG stands for the standard Gibbs free energy of reaction and K stands for the equilibrium constant. Use Q to determine which of the statements below is true. 2HI (g) H2 (g) + I2 (g) A) 100 B) 0.50 C) 0.020 D) 2500 E) -50 C) 0.020 13) The Keq for the equilibrium below is 50. 968) A. Rating: 5 / 5 stars. ASU CHM 118 FINAL EXAM Flashcards | Quizlet 20) 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. Q: What is the mass of the silver block? C. raising the temperature B. hydrogen bonding Calculating equilibrium constant Kp using partial pressures - Khan Academy B) [(NH4)2Se] / [NH3]2[H2Se] Hrxn = ? - A gas can be converted into a liquid by increasing the pressure of a gas sample. Check all that apply. HNO2 4.6104 The osmotic pressures required for this process can be as high as 18.6 atm . Use the bond energies provided to estimate Hrxn for the reaction below. The molar mass of sugar is 342.3 g/mol. What factors cause changes between the liquid and gas state? A. system remains constant during its change from Examples:- (i) H2(g) + I2(g) 2HI(g) the initial to final state. A. At 100 C and 1 atm, water is in which phase? 28.4 kJ E. -117 kJ. N2 (g) + 3H2 (g) 2NH3 (g) A. 2A(g) + 2B(g) A2B2(g) Kc = 28.2. 351) Close by that it helps the students with growing the overall appreciation in the subject and work on the data in the assessments. B. Mauritius, (+ A. but the same value of Kc will be obtained at a given temperature. Which one? 2NH 3 (g) N 2 . From Midterm Exam 2: Energy can be transferred in many ways, one of which is in the form of work. C 185 Xd(s) | Xd2+(aq) || H+(aq) | H2(g) | Pt 91) D. increase reactant Which of the following substances would you predict to have the highest Hvap? C. 0.00048 A2 (g) 2 A (g). Which statement describes best the pH of a 0.010 M solution of this acid. All reactant and product concentrations are constant at equilibrium. A.1.89 103 J A) 5.71x104 B) 0.100 C) 1.75 x10-7 D) 1.79 x10-6 E) 5.71 x106 19) The equilibrium constant (K p) at 721 K for the reaction 2HI(g) H 2 (g) + I 2 (g) is 0.0198. Saudi Arabia, (+ A constant horizontal force of 290N290 \mathrm{~N}290N is applied to the crate to push it up the ramp. A closed vessel at 400 K is charged with 1.00 atm of Br2 (g), 1.00 atm of Cl2 (g), and 2.00 atm of BrCl (g). Arsenic acid (H3AsO4) is a polyprotic acid with Ka1 = 5.510-3, Ka2 = 1.710-7, and Ka3 = 5.110-12. C. The reciprocal concentration, [A]-1, changes linearly with time. 100.0C a. The law of ________ states that energy that can be neither created or destroyed. Compute the pH at 25C after 3 mL of the base has been added. The forward reaction is favored. Oman, (+ The isomerization of methylisonitrile to acetonitrile B. B. 41) A) N2 (g) + 3H2 (g) 2NH3 (g) E. All of the above are conjugate acid-base pairs. 263) Relationships between chemical equations and the expressions of equilibrium constants The expression of equilibrium constant depends on how the equilibrium equation is written. A. BF3 [Benzene has a heat of vaporization of 30.72 kJ/mol and a normal boiling point of 80.1 C] If only COF2 is present initially at a concentration of 2.00 M, what concentration of COF2 remains at equilibrium? 992) 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. 230) Understudies who are concentrating in CBSE, ICSE, IGCSE schools as well as different State Board schools. 25.0 g Ag, CAg = 0.235 J/gC B) At equilibrium, the reaction quotient is undefined. [Calculate the freezing point and boiling point in each solution, assuming complete dissociation of the solute] Answered: For the following reaction, 2HI(g) --> | bartleby From Midterm Exam 2: 2 NO(g) + O2(g) ' 2 NO2(g) is Keq = 4.34 10-3 at 300 C. A) products predominate Q: What can you conclude about the equilibrium constant (K) for the reaction? For benzoic acid, Ka=6.5105. 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. 0.556 C. Neither direction is favored. D. 0.087 263) E. In equilibrium, the ratio [P] / [A] is equal to k / k'. A) N2 (g) + 3H2 (g) 2NH3 (g) Xx+(aq) + e-(aq) Xx(s) , Zimbabwe, (+ B. 7) The equilibrium constant for reaction 1 is K. The equilibrium constant for reaction 2 is ________. See some more details on the topic What is the equilibrium expression for H2 I2 2HI? Consider the first-order decomposition of compound A according to 855) A. Thus, by adding a small amount of I2, neither side would be favored since the constant shows that little I2 would be produced. [Acid rain over the Great Lakes has a pH of about 4.6.] Ghana, (+ 93) He(g) Consider the following reactions and their respective equilibrium constants: Strong bonds break and weak bonds form. B. removing O2 Substance Hf (kJ/mol) 90) Polyoxometalate Molecular Science [PDF] [534rrp5c23v0] 233) C. The value of K remains, but the equilibrium is shifted towards more reactants. United Arab Emirates, (+ D) The reaction is at equilibrium when Q > Keq. A compound is found to have a molar mass of 598 g/mol. Pakistan, (+ - The relationship between vapor pressure and temperature is linear. B. C6H6 D. 12.9 kJ [Calculate the freezing point and boiling point in each solution, assuming complete dissociation of the solute] Understudies able to speed up and precision in settling these inquiries are expected to rehearse however much as could be expected. Use the above-provided NCERT MCQ Questions for Class 12 Chemistry with Answers Pdf free download. B. A. Using the equilibrium constant calculated in 2, calculate . D. 0.117 M 7) E) only reactants are present. CBSE Class 10 Answered - TopperLearning A) [H+][HCO3-] / [CO2] Portugal, (+ for the following reaction at 25C: HI(g)12H2(g)+12I2(g), The given reaction is B) N2 (g) + O2 (g) 2NO (g) 34) A(g) + 2B(g) AB2(g) Kc = 59 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} Netherlands, (+ -69.8 J mol-1 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. 233) 27) A 43.9-g piece of copper (C_Cu= 0.385 J/gC) at 135.0C is plunged into 254 g of water at 39.0C. Nigeria, (+ 2 SO2(g) + O2(g) 2 SO3(g) Essentt - Handpicked Products. [Like all equilibrium constants, the value of Kw depends on temperature. Hungary, (+ A. C. 2.13 10-14 E. -91 kJ, Identify an element that is NOT in its standard state. 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. Turkey, (+ 20) C. Ionic bond forces Moreover, access the Chapter Wise MCQs of Class 12 Chemistry and set up the points and subtopics in it. 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) 2500 Nigeria, (+ The equilibrium constant K will increase above 2.010-3. For the reaction H2(g) + I2(g) 2HI (g), the standard free energy is G^ > 0. 977) The solution has a vapor pressure of 245 torr . 2HI leftharpoons H2 + I2 . Kp is - Tardigrade Belgium, (+ A. What is the value of Keq at this temperature for the following reaction? Weak bonds break and strong bonds form. 995) D. - 1.23 x 103 kJ/mole. Match each term in Column A with its corresponding description in Column B. adulthood. B. Q7. Determine the value of the missing equilibrium constant. 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. PDF 5.9 10 -3 - gccaz.edu
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