B. The equilibrium constant (K ) would be __________. The total number of stars for this article is: 5 in 1 review. D) [SO3]2 / [SO2]2[O2]2 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. Both TP and CP are located on the solid/liquid phase boundary. A) N2 (g) + 3H2 (g) 2NH3 (g) C. The value of pH is 6.65. Saudi Arabia, (+ D -511. 41) Part B: Calculate the work done, w. [A 100-W lightbulb is placed in a cylinder equipped with a moveable piston. - A gas can be converted into a liquid by heating. A. -1282 kJ E. -1.35C. E. The equilibrium constant K as well as [A] and [A2] are unchanged. 37.5 g ), [A 100-W lightbulb is placed in a cylinder equipped with a moveable piston. Q: Calculate the molality of the solution. Mauritius, (+ 2SO2 (g) + O2 (g) 2SO3 (g) }}+5y=26e^{3t},~~~~~y_{0}=1,~y_{0}^{^{\prime }}=5. A. 64) Portugal, (+ 7) The equilibrium constant for reaction 1 is K. The equilibrium constant for reaction 2 is ________. A. BF3 968) Explain why chlorine occurs as diatomic molecules in nature rather than individual atoms. The specific heats of ice, water, and steam are 2.09 J/gK, 4.18 J/gK, and 1.84 J/gK, respectively. 2NH3 (g) N2 (g) + 3H2 (g) B. SiH4 E. H3O+. Saudi Arabia, (+ 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? A) [NH3][H2Se] / [(NH4)2Se] A. 27) Consider the chemical equation and equilibrium constant at 25C: Given: [Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 C. C. 16.6 kJ A) [SO3] / [SO2][O2] 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. * Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project CH4(g)+2Cl2(g)CH2Cl2(g)+2HCl(g) (look up phase diagram). B) Keq does not change with temperature, whereas Q is temperature dependent. E) all of the above, 32) Consider the following reaction at equilibrium: E. 5.01 torr. - The vapor pressure of a liquid increases with increasing temperature. O=O 498 -25.5 kJ Which statement is true at equilibrium? 6.41 United States, (+ Experts are tested by Chegg as specialists in their subject area. Georgia, (+ Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. D. 456 kJ 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 ? If only COF2 is present initially at a concentration of 2.00 M, what concentration of COF2 remains at equilibrium? - A liquid can be converted to a gas by cooling. Georgia, (+ 0.183 D) Q does not depend on the concentrations or partial pressures of reaction components. -4.56C 351) If you find. 49) The reaction : N 2O4 2N O2 J & K CET 2018 8. Q: What is the value of the equilibrium constant, Kp, for the reaction? is Keq = 230 at 300 C. E. +4087 J mol-1, 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. 46) C. remove reactant 64) Q: What is the percent ionization of ammonia at this concentration? France, (+ A B + C Nigeria, (+ E. 1.62. Mexico, (+ 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. Strong bonds break and weak bonds form. Note: Names of real elements have been changed to 'Xd'. 2NH 3 (g) N 2 . 10) The Keq for the equilibrium below is 7.52 10-2 at 480.0 C. Rehearsing NCERT Online Chemistry MCQ Questions for Class 12 with Answers is perhaps the most effective way to plan for the CBSE Class 12 board test. Use the above-provided NCERT MCQ Questions for Class 12 Chemistry with Answers Pdf free download. corresponds to which redox cell reaction ? 960) 45) At equilibrium, ________. E) [SO3] / [SO2][O2]2, 16) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? Afghanistan, (+ What is the Kw of pure water at 50.0C, if the pH is 6.630? [Like all equilibrium constants, the value of Kw depends on temperature. 90) Russia, (+ Ghana, (+ E. -91 kJ, Identify an element that is NOT in its standard state. - A gas can be converted into a liquid by cooling. 855) 34) B. HI(g)12H2(g)+12I2(g), The equilibrium constant is given for one of the reactions below. 41) E) decrease the partial pressure of CO, D) increase the value of the equilibrium constant, 34) Consider the following reaction at equilibrium. [Consider these two acids and their Ka values: 0.233 M Nigeria, (+ M. What is the half-life, t1/2, for this reaction in units of seconds ? Egypt, (+ D. Nothing can be concluded about K from Ecell. B. All the Solutions are explained in a comprehensive manner and are recommended by many subject experts. A) 25 91) Portugal, (+ From Midterm Exam 2: 64) Xd(s) | Xd2+(aq) || H+(aq) | H2(g) | Pt The most easily measurable form of energy comes in the form of heat, or enthalpy. Assuming that no heat is lost to the surroundings, what will the final temperature of the system be? is given by, 21) The equilibrium constant for the gas phase reaction Donald A. McQuarrie, Ethan B Gallogly, Peter A Rock, Edward Atkins, Julio de Paula, Peter Atkins. B) reactants predominate 230) D. The value of K remains, but the equilibrium is shifted towards more products. So, visit our site and easily find MCQs for all subjects classwise. For instance, it is used to make the refrigerant carbon tetrafluoride, CF4 via the reaction 1 Answer +1 vote answered Dec 12, 2019 by Kajal01 (25.8k points) Answer (c) amount of H2 and I2 Prev Question Next Question Penguins??] 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. 1-propanol Additionally, you can reconsider all Chemistry sections appropriately whenever and save significant season of yours during class tests and yearly tests readiness. 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 ? Albania, (+ 2COF2(g)CO2(g)+CF4(g), Kc=6.30 D. TP and CP are always at the same pressure. If the temperature is raised, then the forward reaction is favored. Tajikistan, (+ 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 Calculate the standard enthalpy change for the reaction 995) D. If the temperature is raised, then the reverse reaction is favored. C 185 Arsenic acid (H3AsO4) is a polyprotic acid with Ka1 = 5.510-3, Ka2 = 1.710-7, and Ka3 = 5.110-12. The NCERT Solutions for the questions are present on our site or you can find them online too. Q: What is the half-life for this reaction? XaO4-(aq) + 4 H+(aq) + 3 e-(aq) XaO2(s) + 2 H2O(l) . 263) 33) In chemical equation H2(g) + I2(g) 2HI(g), the equilibrium Kp depends on. 2A(g) + B(g) A2B(g) Kc = ? An aqueous solution contains 0.10M H 2S and 0.20M H Cl . Q6. You will track down a rundown of Chapter wise MCQ Questions with Answers for CBSE Class 12 Chemistry here to start your planning. (b)(b)(b) How much time does it take the crate to travel to the top of the ramp? B) reactants predominate C. 12.28 [An aqueous solution contains 32% HCl by mass] at a certain temperature. B. 2 NO(g) + O2(g) 2 NO2(g) Hrxn = ? What is the rate constant, k, for this reaction in units of L mol-1 s-1. . C) roughly equal amounts of products and reactants are present 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. A. K<1 92) B. C6H6 NCERT Exemplars are basically practice-books that contain additional questions of higher level and give you comprehensive and thorough learning. 348) Strong bonds break and weak bonds form. where n represents the stoichiometric coefficients] 100.0C South Korea, (+ C. 0.037 Finland, (+ 1/2 N2(g) + O2(g) NO2(g) Hrxn = +33 kJ 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. Terms T&C. 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. To have a decent groundwork for your impending board test then you should endeavor these internet based tests for Chemistry. Ghana, (+ A. B) The equilibrium partial pressure of BrCl (g) will be 4.00 atm. A) 2HI (g) H2 (g) + I2 (g) C) [H+][HCO3-] / [CO2][H2O] Sweden, (+ B -423 B. 971) C. dipole-dipole The osmotic pressures required for this process can be as high as 18.6 atm . 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. Maldives, (+