A. H2(g) + I2(g) . To have a decent groundwork for your impending board test then you should endeavor these internet based tests for Chemistry. See Answer. 2) Which one of the following is true concerning the Haber process? Which one statement regarding the first-order reaction When a reactio. United States, (+ [An aqueous solution contains 32% HCl by mass] A. 968) [Benzene has a heat of vaporization of 30.72 kJ/mol and a normal boiling point of 80.1 C] O=O 498 B) [SO2] / [SO3] 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. C. K>1 10.9 kJ mol-1 E. H3O+. 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. - A liquid can be converted to a gas by heating. A) 5.26 10-20 41) Chemistry MCQ For Class 12 Chapter astute with Answers PDF Download. Calculate the pOH of a solution that contains 7.8 x 10-6 M OH- at 25C. 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: The specific heats of ice, water, and steam are 2.09 J/gK, 4.18 J/gK, and 1.84 J/gK, respectively. Q: Find the value of the [H3O+] of rain over the West Coast that has a pH of 5.5. 20) 2 SO2(g) + O2(g) 2 SO3(g) E) [H+][HCO3-], 18) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? The value of pH is somewhat higher than 6.65. The heat capacity of the calorimeter is 4.90 kJ/C. After 203 s the concentration of A had fallen to one fifth of the initial value. Pure pentane and hexane have vapor pressures of 425 torr and 151 torr, respectively, at room temperature.] 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) Find the equilibrium amounts of these compounds if they all start out at 0.120 M. Solution: Determine Qc so that you know which direction the reaction will proceed. CBSE Textbooks can be great to guide you for any exam and has detailed solutions for the questions. Consider the following chemical reaction: H2 (g) + I2 (g) <> 2HI (g) At equilibrium in a particular experiment, the concentrations of H2, I2, and HI were 0.15 M, 0.033 M, and 0.55 M, respectively. 4) Which of the following expressions is the correct equilibrium-constant expression for the equilibrium between dinitrogen tetroxide and nitrogen dioxide? Q: What is the mole fraction of hexane? Part A: How much butane is present as a liquid at 22C? The formation of HI from H2 and I2 is an example of gaseous homogeneous equilibrium reaction. 46) C. 11.70 A. increase product Egypt, (+ This quantity of heat is equivalent to: information you need to know about E for the system, [The total change in internal energy is the sum of the heat, q, and work, w: E=q+w]. D. +473 kJ 2SO3 (g) 2SO2 (g) + O2 (g) Russia, (+ Calculate the standard enthalpy change for the reaction B. NaCl D. capillary action B) H2 (g) + Cl2 (g) 2 HCl (g) 44) 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. Which of the following (with specific heat capacity provided) would show the smallest temperature change upon gaining 200.0 J of heat? 380) The equilibrium constant (Kp) for the interconversion of PCl5 and PCl3 is 0.0121: PCl5 (g) PCl3 (g) + Cl2 (g) . 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. 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 ? D. 5.50 10-14 D. 456 kJ What is the rate constant, k, for this reaction in units of L mol-1 s-1. For these conditions, what is the value of Kp for the reaction that occurred: 10 Thusly, students who have started their board test course of action can include the NCERT Chemistry MCQ Questions for Class 12 with Answers. B. C6H6 B. HPO42- 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. Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. 2075 You will track down a rundown of Chapter wise MCQ Questions with Answers for CBSE Class 12 Chemistry here to start your planning. 82) B) reactants predominate 995) 92) 2 HBr(g) H2(g) + Br2(g) Kc = ? From Midterm Exam 2: 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. C. 12.54 Part B: Calculate the boiling point of the solution above. 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] 2.35 x 104 kJ/mole After a sufficiently long time, [A] will approach zero, regardless of the values of k and k'. B) the rates of the forward and reverse reactions are equal. Science Chemistry For the following reaction, 2HI(g) --> H2(g) + I2(g) a. 46) [An object can possess kinetic energy, the energy of motion, and/or potential energy, the energy of position. B. CP is always at a higher temperature relative to TP. Nepal, (+ Swaziland, (+ (Assume that the cylinder and lightbulb assembly comprise the system and assume two significant figures. Afghanistan, (+ Q: What can you conclude about the equilibrium constant (K) for the reaction? E. All of these have intermolecular forces stronger than dispersion. Switzerland, (+ +25.5 kJ A) 25 We reviewed their content and use your feedback to keep the quality high. C. 840 J =1.33x10-3 M and [H+] = 1.33x10-3M The equilibrium constant, K eq, for the ionization of acetic acid at 25 C is _____. 32) Albania, (+ United Kingdom, (+ C. 1.92 x 103 kJ/mole A. ion-ion Q: Calculate the [H3O+] of this rain. D. 0.420 25) At 400 K, the equilibrium constant for the reaction C) 0.020 Bahrain, (+ Exams . D. 12.9 kJ 52) B. Both TP and CP are located on the solid/liquid phase boundary. Consider the first-order decomposition of compound A according to The reaction mixture will contain [A]=0.1M and [B]=1.0M. Br2 (g) + Cl2 (g) 2BrCl (g) Tajikistan, (+ 230) What is the boiling point of water at an elevation of 1.00104 ft ? Part B: Calculate the work done, w. [A 100-W lightbulb is placed in a cylinder equipped with a moveable piston. 355) 2 HD(g) H2(g) + D2(g) Kc = 0.28 [An aqueous solution contains 32% HCl by mass] B. 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 ? E) none of the above, 15) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? Here's an example. Understudies who are concentrating in CBSE, ICSE, IGCSE schools as well as different State Board schools. 2CO2 (g) 2CO (g) + O2 (g) H = -514 kJ In each table, there may be one statement that is false because it contradicts the other three statements. A P C. H3O+/OH- [A] and [P] denote the concentrations of A and P, respectively. D) only products are present E. 48.1 J, [A 100-W lightbulb is placed in a cylinder equipped with a moveable piston. D) a decrease in the total volume of the reaction vessel (T constant) Mauritius, (+ 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. The equilibrium mixture contained 1.37 10 2 M HI, 6.47 10 3 M H2, and 5.94 10 4 M I2. At equilibrium, ________. How is vapor pressure related to temperature? Belgium, (+ B) increase the partial pressure of CO2 (g) 1/2 N2(g) + O2(g) NO2(g) Hrxn = +33 kJ Q: What is the theoretical cell potential assuming standard conditions? United States, (+ (Pg.5) (c) Isobaric process:- An isobaric process is In a homogeneous equilibrium, all the defined as one in which the pressure of the reactants and products are in the same phase. A) increase the rate of the forward reaction only Poland, (+ (+ where n represents the stoichiometric coefficients] 880) Q: What is the pH of a 0.240 M ammonia solution? Cd(s) + 2 Ag+(aq) Cd2+(aq) + 2 Ag(s), Calculate E cell C. 150 g 224) What is the vapor pressure of propane at 25.0 C? A. K<1 Use these reactions and their equilibrium constants to predict the equilibrium constant for the following reaction: 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. with forward (A P) rate constant k and reverse (A P) rate constant k' is correct? 49) A. From Midterm Exam 2 : C. The anomaly of carbon dioxide is that it has a CP but no TP. - A gas can be converted into a liquid by increasing the pressure of a gas sample. A(g) + 3B(g) AB3(g) Kc = 478, The equilibrium constant is given for two of the reactions below. South Africa, (+ 34) PART A: D) At equilibrium, the total pressure in the vessel will be less than the initial total pressure. There is not a viable replacement for reliable practice whether one needs to comprehend an idea completely or one needs to score better. B. This equilibrium is an exothermic one. Use the following reactions and given H values. Q: Assuming ideal behavior, what is the concentration of the solute within the solution in mole percent? Note: Names of real elements have been changed to 'Xd'. Understudies who wish to hone their insight into Chemistry. D. Energy is neither created nor destroyed, excluding nuclear reactions.