355) The equilibrium mixture contained 1.37 10 2 M HI, 6.47 10 3 M H2, and 5.94 10 4 M I2. 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]. 992) From Midterm Exam 2 : The most easily measurable form of energy comes in the form of heat, or enthalpy. The reaction mixture will contain [A]=1.0M and [B]=0.1M. Russia, (+ The solution has a vapor pressure of 245 torr . . - The relationship between vapor pressure and temperature is not linear, but rather, it is exponential. - A gas can be converted into a liquid by increasing the pressure of a gas sample. 49) What is the value of Keq for the following reaction? Calculate the standard enthalpy change for the reaction E) only reactants are present, 22) The equilibrium constant for the gas phase reaction 2SO2 (g) + O2 (g) 2SO3 (g) [An aqueous solution contains 32% HCl by mass] M. What is the half-life, t1/2, for this reaction in units of seconds ? D. 40.5C 45) New Zealand, (+ Which of the following (with specific heat capacity provided) would show the smallest temperature change upon gaining 200.0 J of heat? 2HI(g) I, M 1.00 1.00 0 C, M -x -x +2x . 48.6 C Egypt, (+ Finland, (+ Mauritius, (+ A. Chemistry MCQ For Class 12 Chapter astute with Answers PDF Download. [The reaction X products is second order in X and has a rate constant of 0.035 M1s1] Which of the following signs on q and w represent a system that is doing work on the surroundings, as well as gaining heat from the surroundings? C. 150 g Nigeria, (+ Le Chtelier's principle predicts that a decrease in temperature will ________. Understudies who are planning for State board assessments in Chemistry like PUC, Intermediate tests, and so on. Br2 (g) + Cl2 (g) 2BrCl (g) E. dispersion. Russia, (+ 92) H2(g)+I2(g)2HI(g) , K=6.2102 Calculate the equilibrium constant Hungary, (+ Understudies who are planning for different school tests, for example, unit-tests, term-tests, semester tests, half-yearly and yearly tests and assessments on Chemistry-Class 12. 93) A) [HF][H2O] / [H3O+][F-] [The decomposition of SO2Cl2SO2Cl2 is first order in SO2Cl2SO2Cl2 and has a rate constant of 1.46104 s1s1 at a certain temperature] 2) Which one of the following is true concerning the Haber process? B. B) the rates of the forward and reverse reactions are equal. 966) 64) cors.archive.org 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. 91) Consider the following reactions and their respective equilibrium constants: Explain why chlorine occurs as diatomic molecules in nature rather than individual atoms. 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. The reaction mixture will contain [A]=0.1M and [B]=1.0M. 100.0C A. - 1.92 x 103 kJ/mole b. C. 62.5C D) 1.90 1019 Understudies who wish to hone their insight into Chemistry. Xd(s) | Xd2+(aq) || H+(aq) | H2(g) | Pt Understudies able to speed up and precision in settling these inquiries are expected to rehearse however much as could be expected. 7) The equilibrium constant for reaction 1 is K. The equilibrium constant for reaction 2 is ________. All reactant and product concentrations are constant at equilibrium. Substance Hf (kJ/mol) [An object can possess kinetic energy, the energy of motion, and/or potential energy, the energy of position. y+4y+5y=26e3t,y0=1,y0=5. A. According to the following thermochemical equation, what mass of HF (in g) must react in order to produce 345 kJ of energy? HF (aq) + H2O (l) H3O+ (aq) + F- (aq) B) The equilibrium partial pressure of BrCl (g) will be 4.00 atm. [An aqueous solution contains 32% HCl by mass] A. 82) ), [A 100-W lightbulb is placed in a cylinder equipped with a moveable piston. [Benzene has a heat of vaporization of 30.72 kJ/mol and a normal boiling point of 80.1 C] 27) B. Switzerland, (+ 0.13 M C. 4.3 M D. 0.039 M E) only reactants are present, 23) The equilibrium constant for the gas phase reaction D) 100 B. 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. A) N2O4 (g) 2NO2 (g) Finland, (+ B. Intramolecular forces Determine the equilibrium concentration, [H3BO3], of this weak acid in the solution. A. K<1 Nigeria, (+ A) 2HI (g) H2 (g) + I2 (g) 2 Xs(s) + 3 Xn2+(aq) 2 Xs3+(aq) + 3 Xn(s) . \mathrm{~Pb}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightleftharpoons \mathrm{Pb}(\mathrm{s}) & \text { voltage }=-0.13 \mathrm{~V} \\ 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. 8.36 torr The final temperature of the mixture upon reaching thermal equilibrium is 27.9 C] The majority of the boards that prefer the NCERT Textbooks can use these Solutions for getting a grip on the subject. (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. 2.34 10-7 Which statement describes best the pH of a 0.010 M solution of this acid. Consider the chemical equation and equilibrium constant at 25C: E. -117 kJ. Saudi Arabia, (+ K, start subscript, start text, c, end text, end subscript. [The decomposition of SO2Cl2 is first order in SO2Cl2 and has a rate constant of 1.46104 s1 at a certain temperature] Swaziland, (+ 880) D. capillary action C. Ionic bond forces Is there any website that covers MCQ Questions for CBSE Class 6 to 12? NCERT CBSE KVS Class 12 Chemistry MCQs will assist the children with reinforcing ideas and further develop marks in tests and tests. E) Q is the same as Keq when a reaction is at equilibrium. Cambodia, (+ E. There is not enough information to calculate the Kw. H2 + I2 = 2HI | Chemical Equation C) 6.44 105 What is the value of Keq for the following reaction? [The heat of combustion of CH4 is 890.4 kJ/mol and the heat capacity of H2O is 75.2 J/molK] D. 5.11 O=O 498 [Nickel and aluminum electrodes are used to build a galvanic cell. Poland, (+ B. E. 5.01 torr. E. All of the above are conjugate acid-base pairs. Compute the pH at 25C after 3 mL of the base has been added. B. H2SO3/HSO3- Turkey, (+ 351) E. Xd + 2 H+ Xd2+ + H2. A -253 +238 kJ \mathrm{Cu}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightleftharpoons \mathrm{Cu}(\mathrm{s}) & \text { voltage }=+0.34 \mathrm{~V} \\ Part A: Calculate the freezing point of a solution containing 12.2 g FeCl3 in 160 g water. [A redox reaction has an Ecell=1.00V] Bahrain, (+ Which of the following is TRUE if E sys = - 115 J? 48) Mexico, (+ United Arab Emirates, (+ Determine the partial pressure of each gas at equilibrium. 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) E. 2.11, From Midterm Exam 2: User Agreement,Privacy Policy From Midterm 3: 263) Albania, (+ A. The reaction : N 2O4 2N O2 J & K CET 2018 8. Portugal, (+ B. B. [The total change in internal energy is the sum of the heat, q, and work, w: E=q+w] the sign of E for the system: negative (-) = The system expands and the surroundings get hotter positive (+) = The system contracts and the surroundings get colder Which of the following is TRUE if E sys = - 115 J? C. dipole-dipole Weak bonds break and strong bonds form. Spain, (+ Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. C. Xd2+ + 2 H+ Xd + H2 C) The reaction is at equilibrium when Q < Keq. The isomerization of methylisonitrile to acetonitrile Careful quan titative dehydration experiments [17] show that at 173 K each protonated form o f the anion has a distinct resonance, see Figure 8 . E. -91 kJ, Identify an element that is NOT in its standard state. Netherlands, (+ 263) Or if any of the following reactant substances I2 (iodine), disappearing [Calculate the freezing point and boiling point in each solution, assuming complete dissociation of the solute] D) only products are present Denmark, (+ [A solution contains a mixture of pentane and hexane at room temperature. F 2100 universal tv remote manual ethanol is capable of forming hydrogen bonds with water good breakfast cereal for type 2 diabetes naturally with diet Of the three basic states of matter, the particles in gas are much . Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. [Calculate the freezing point and boiling point in each solution, assuming complete dissociation of the solute] 90) is Kp = 7.0. Netherlands, (+ For the reaction H2(g) + I2(g) 2HI (g), the standard free energy is G^ > 0. Determine the pH value at 25C for a 0.062 M solution of a base that is 100% dissociated. Which statement is true of an endothermic reaction? D) [NH3]2[H2Se] Q: Calculate the [H3O+] of this rain. Is Why I2 H2 A Explain A And Gas Is Solid - mon.confael.lazio.it D. 13.16 1/2 N2(g) + O2(g) NO2(g) Hrxn = +33 kJ D) At equilibrium, the total pressure in the vessel will be less than the initial total pressure. B. Netherlands, (+ E. The value of pH is 2.13. The amount of 2.62 mol of a sugar is added to 1.64 kg of pure water at standard pressure. C. The bonds that break and those that form are of approximately the same strength. 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. E. methanol, Give the major force between ethanol and water. D. 32.2 kJ mol-1 Maldives, (+ 2075 Pakistan, (+ Tajikistan, (+ C) roughly equal amounts of products and reactants are present Poland, (+ 230) D. 0.420 The forward reaction is favored. Top 2 posts Page 1 of 1 Germany, (+ A(g) + 2B(g) AB2(g) Kc = 59 B. B. Ukraine, (+ See some more details on the topic What is the equilibrium expression for H2 I2 2HI? A. BF3 In this case, you just need to observe to see if product substance HI (hydroiodic acid), appearing at the end of the reaction. So Kp = (PH2) x (PI2) / PHI^2 P = partial pressure What is NCERT Exemplar and where can we get its Solutions? -333 kJ 0.269 Homogeneous Equilibrium - Chemical Equation, Example and Equilibrium 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. 2HI = H2 + I2 | Chemical Equation. Q7. H2 (g) + I2 (g) 2HI (g) What is the value of Keq for the following reaction? E. The reverse reaction is favored. C-H 414 B) H2 (g) + Cl2 (g) 2 HCl (g) What is dynamic equilibrium? A. O2 E) [H+][HCO3-], 18) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? A. D) only products are present . C) 7.07 D. 12.79 You will track down a rundown of Chapter wise MCQ Questions with Answers for CBSE Class 12 Chemistry here to start your planning. D. SiF4 E. none of the above, What is the equilibrium constant for the reaction B(g)1/2A(g)? 992) Bangladesh, (+ A. PO43- C. 0.222 D. 4.60. [Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 C. H2 (g) + I2 (g) HI (g) A) 25 B) 2500 C) 7.07 D) 100 E) -50 C) 7.07 C. 2.13 10-14 C. The reaction mixture will contain equal concentrations of A and B. Q: Find the volume of methane measured at 298 K and 1.72 atm required to convert 0.620 L of water at 298 K to water vapor at 373 K. The enthalpy change for converting 1.00 mol of ice at -50.0C to water at 70.0C is __________ kJ. 234) 6 H2(g) + 6 D2(g) 12 HD(g) Kc = ? 32) 26) Which of the following statements is true? Switzerland, (+ Thusly, students who have started their board test course of action can include the NCERT Chemistry MCQ Questions for Class 12 with Answers. B. Oman, (+ Solved Hydrogen iodide undergoes decomposition according to - Chegg D. 7.2 10-4 M, Find the pH of a 0.390 M aqueous benzoic acid solution. Q8. 351) D. Energy is neither created nor destroyed, excluding nuclear reactions. Pakistan, (+ Comprehend the ideas and practice Objective Type Questions for twelfth Class Chemistry however much you can to score well. Use the above-provided NCERT MCQ Questions for Class 12 Chemistry with Answers Pdf free download. is given by, 21) The equilibrium constant for the gas phase reaction 3. Germany, (+ Which of the following statements is TRUE? A reversible reaction can proceed in both the forward and backward directions. Determine the value of . What is the stoichiometric coefficient of Xx(s) in the balanced reaction equation for that cell ? The equilibrium constant K p is independent of (A) Total pressure (B) Catalyst (C) The amounts of H 2 and I 2 present However, it changes with Temperature 17.9 A homogeneous equilibrium reaction exists when all the components of the reaction are in the same phase (i.e., gas, liquid, solid, aqueous). It will assist you with knowing regardless of whether your arrangement is continuing the correct way. For instance, it is used to make the refrigerant carbon tetrafluoride, CF4 via the reaction Denmark, (+ [The half-life for the radioactive decay of U238 is 4.5 billion years and is independent of initial concentration] Sn(s)|Sn2+(aq)NO(g)|NO3(aq),H+(aq)|Pt(s), 3Sn(s)+2NO3(aq)+8H+(aq)3Sn2+(aq)+2NO(g)+4H2O(l), [Use tabulated half-cell potentials to calculate Grxn for each of the following reactions at 25 C] NO(g)+12Br2(g)NOBr(g)Kp=5.3 C) roughly equal amounts of products and reactants are present Phenomenon after H2 (hydrogen) reacts with I2 (iodine) This equation does not have any specific information about phenomenon.
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in chemical equation h2+i2=2hi the equilibrium constant kp depends on