in chemical equation h2+i2=2hi the equilibrium constant kp depends on

at a certain temperature. Calculate Erxn for the combustion of sucrose in kJ/mol sucrose. E. All of the above are true. Let's flip the above reaction. A reversible reaction can proceed in both the forward and backward directions. Swaziland, (+ 855) By clicking Agree & join, you agree to the Study24x7 E. 5.01 torr. 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. Switzerland, (+ E. dispersion. E. CP is always at a lower temperature relative to TP. 50.0 g Cu, CCu = 0.385 J/gC 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. Chemistry MCQ For Class 12 Chapter astute with Answers PDF Download. 93) 234) PART A: 49) C. +873 J mol-1 Saudi Arabia, (+ Nigeria, (+ B. is Keq = 230 at 300 C. United Kingdom, (+ [Benzene has a heat of vaporization of 30.72 kJ/mol and a normal boiling point of 80.1 C] C=O 799 Turkey, (+ - A gas can be converted into a liquid by increasing the pressure of a gas sample. 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. 0.183 Equilibrium is when the rate of the forward reaction equals the rate of the reverse reaction. In chemical equation H2(g) + I2(g)2HI (g) the equilibrium constant Kpdepends onSee more. Spain, (+ Q: What is the mass of the silver block? Switzerland, (+ The NCERT Solutions for the questions are present on our site or you can find them online too. 33) B. Xd + 2 H+ 2 Xd+ + H2 Here you will find NCERT MCQ Questions for Class 12 Chemistry with Answers PDF Free Download based on the important concepts and topics given in the textbook.This may assist you to understand and check your knowledge about the chapters. C) N2 (g) + 3H2 (g) 2 NH3 (g) B. H2SO3/HSO3- Detailed description of the questions is given by subject experts and you can use them as a reference during your preparation. Understudies who are planning for State board assessments in Chemistry like PUC, Intermediate tests, and so on. Consider the following reactions and their respective equilibrium constants: Suppose 0.811 mol of HI is placed in a 1.50-L container at 500 K. What is the equilibrium concentration of H2 (g)? What is the need of NCERT Solutions and CBSE MCQs? Bangladesh, (+ These numerous decision inquiries for Chemistry Class 12 will assist with further developing logical and complex issue unraveling abilities. 348) In a particular experiment, the partial pressures of H 2 and I 2 D) [CO2][H2O] / [H+][HCO3-] [Acid rain over the Great Lakes has a pH of about 4.6.] Germany, (+ D. Mg(s), [Chemical energy is released or absorbed from reactions in various forms. B) H2 (g) + Cl2 (g) 2 HCl (g) D) [NH3]2[H2Se] Russia, (+ [Ammonia, NH3, is a weak base with a Kb value of 1.8105.] C. 12.28 H2(g) + I2(g) 2HI(g) At equilibrium, the mixture is found to contain 1.580 mole of HI. From the data given we can determine the starting concentrations of both H 2 and I 2 to be CH2 = nH2 V = 2.40moles 1.00L = 2.40M CI2 = nI2 V = 2.40moles 1.00L = 2.40M We can now determine the equilibrium concentrations for this reaction by using the ICE method (more here: http://en.wikipedia.org/wiki/RICE_chart) . 7.2 10-5 M \mathrm{Cu}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightleftharpoons \mathrm{Cu}(\mathrm{s}) & \text { voltage }=+0.34 \mathrm{~V} \\ Check all that apply. 2 HI(g) H2(g) + I2(g) Kc= 0.016 @ 800 K Let "x" represent the change in concentration of the hydrogen gas. Science Chemistry For the following reaction, 2HI(g) --> H2(g) + I2(g) a. The P-M AS-NM R chemical shift changes from -15.6 ppm ( 6 -hydrate) to - 1 1.0 ppm (anhydrous). United States, (+ Determine the pH value at 25C for a 0.062 M solution of a base that is 100% dissociated. 230) 2003-2023 Chegg Inc. All rights reserved. Where to download CBSE MCQs for all Classes and Subjects? [A redox reaction has an Ecell=1.00V] The enthalpy of a reaction can be calculated from the heats of formation of the substances involved in the reaction: Understudies who are getting ready for designing and clinical selection tests like NEET, IIT JEE, AIIMS, JIPMER and SAT Exams in Chemistry. Understudies able to speed up and precision in settling these inquiries are expected to rehearse however much as could be expected. C) [H3O+][F-] / [HF][H2O] 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. Chemistry MCQ For Class 12 Chapter astute with answers PDF Download records are given here free of charge of cost. 91) B. 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. HOCl(aq) + H2O(l) H3O+(aq) + OCl-(aq). Pure pentane and hexane have vapor pressures of 425 torr and 151 torr, respectively, at room temperature.] Enter the email address you signed up with and we'll email you a reset link. B) 1.9 10-14 Understudies can get to the CBSE NCERT MCQ Questions of Class 12 Chemistry with Answers Pdf of all Chapters liberated from cost from here. 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 ? 28) Which reaction will shift to the left in response to a decrease in volume? Maldives, (+ A. Calculate Hrxn for the following reaction: 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 . +206 kJ United Arab Emirates, (+ A) increase the rate of the forward reaction only For instance, it is used to make the refrigerant carbon tetrafluoride, CF4 via the reaction 348) Zimbabwe, (+ B) reactants predominate B) reactants predominate B. Thank you for your participation! Q: Pb2+(aq)+Mg(s)Pb(s)+Mg2+(aq). Which metal ion in the list is most difficult to reduce? After 203 s the concentration of A had fallen to one fifth of the initial value. There is not a viable replacement for steady practice whether one needs to comprehend an idea completely or one needs to score better. Provide your answer in units of volts (V). Catalysts have no effect on equilibrium situations. Finland, (+ 45) A. viscosity 6 H2(g) + 6 D2(g) 12 HD(g) Kc = ? (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. 49) for the following reaction at 25C: HI(g)12H2(g)+12I2(g), The given reaction is C. K>1 If you find. New Zealand, (+ The formation of HI from H2 and I2 is an example of gaseous homogeneous equilibrium reaction. C. 16.6 kJ [The reaction X2(g)2X(g) occurs in a closed reaction vessel at constant volume and temperature. CH4(g)+2Cl2(g)CH2Cl2(g)+2HCl(g) Provide your answer in units of mol L-1. A) N2 (g) + 3H2 (g) 2NH3 (g) A. 233) 2HI(g) I, M 1.00 1.00 0 C, M -x -x +2x . To have a decent groundwork for your impending board test then you should endeavor these internet based tests for Chemistry. 1-propanol D) at low temperature and high pressure C) The reaction is at equilibrium when Q < Keq. 351) A) products predominate D) only products are present What is the value of Keq at this temperature for the following reaction? -69.8 J mol-1 Explain why chlorine occurs as diatomic molecules in nature rather than individual atoms. D. H3PO4 A. Part B: If the butane is warmed to 25 C, how much liquid butane is present? An aqueous solution contains 0.10M H 2S and 0.20M H Cl . 263) -2.16C The statements in the tables below are about two different chemical equilibria. B) N2O4 (g) 2NO2 (g) 7) A. [Like all equilibrium constants, the value of Kw depends on temperature. Equilibrium constant expression in terms of partial pressures Identify the change that will always shift the equilibrium to the right. The molar mass of sugar is 342.3 g/mol. C-O 360 D. TP and CP are always at the same pressure. M. What is the half-life, t1/2, for this reaction in units of seconds ? C. +115 kJ is given by, 21) The equilibrium constant for the gas phase reaction The standard reduction potential for the nickel(II) ion is 0.26 V and that of the aluminum(III) ion is 1.66 V] Which statement is true at equilibrium? A. 93) From Midterm Exam 2: Calculate the standard cell potential, Ecell, for the cell defined by the reaction Based on the freezing point depression constant for water, Kf = 1.86 K /(mol kg-1), what is the freezing temperature of the mixture. United Kingdom, (+ 90) E. 53.1C, The specific heat capacity of liquid water is 4.18 J/g-K. How many joules of heat are needed to raise the temperature of 5.00 g of water from 25.1C to 65.3C? B. Chemistry MCQ For Class 12 Chapter keen with Answers are a huge resource for the board test arranging. Part B: What is the value of H for the combustion of the fuel? 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. 0.21 M B. What is the vapor pressure of propane at 25.0 C? D. 173 g Phenomenon after H2 (hydrogen) reacts with I2 (iodine) This equation does not have any specific information about phenomenon. 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. E) [NH3]2[H2Se] / [(NH4)2Se], 17) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? 7) The equilibrium constant for reaction 1 is K. The equilibrium constant for reaction 2 is ________. From Midterm 3: A. Covalent bond forces B) Keq does not change with temperature, whereas Q is temperature dependent. We hope the given NCERT MCQ Questions for Class 12 Chemistry PDF Free Download will definitely yield fruitful results. (look up phase diagram). 91) 358) C. 62.5C 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] E. 42.7 g. [When 1 mol of a fuel is burned at constant pressure, it produces 3455 kJ of heat and does 12 kJ of work] E) The reaction is at equilibrium when Q = Keq. South Africa, (+ In this case, you just need to observe to see if product substance HI (hydroiodic acid), appearing at the end of the reaction. Note: Names of real elements have been changed to 'Xd'. is Keq = 3.6 10-3 at 999 K. At equilibrium, ________. C. 1.92 x 103 kJ/mole Georgia, (+ Use the following data: 3.48 J/(g C) B) the rates of the forward and reverse reactions are equal. is Keq = 2.80 102 at 999 K. At equilibrium, ________. You can utilize the quick links on our page to view or download the CBSE MCQs of all classes in an easy way. C. H3O+/OH- What is the value of Keq for the following reaction? Zimbabwe. Cambodia, (+ D) [SO3]2 / [SO2]2[O2]2 [The heat of combustion of CH4 is 890.4 kJ/mol and the heat capacity of H2O is 75.2 J/molK] C) 2 SO3 (g) 2 SO2 (g) + O2 (g) Calculate the change in pH after 15 mL of a 0.4 M solution of a strong base had been added to 100 mL of this buffer. B. 234) Hrxn= npHf(products) nrHf(reactants) 224) (b)(b)(b) How much time does it take the crate to travel to the top of the ramp? 82) 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 D. CO D. 1.2 0.269 From Midterm Exam 2: A) some removal of from the reaction vessel (V and T constant) Portugal, (+ If only COF2 is present initially at a concentration of 2.00 M, what concentration of COF2 remains at equilibrium? Oman, (+ Q: What is the [H3O+] in pure water at body temperature? B. A. Erxn can be determined using constant volume calorimetry. 41) 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} [An aqueous solution contains 32% HCl by mass] 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. What is the Kw of pure water at 50.0C, if the pH is 6.630? Denmark, (+ \end{array} C. 55.8 C South Korea, (+ Coming up next are not many significant advantages of CBSE MCQs with Answers for Class 12 Chemistry distributed by cbseMCQ.com: Q1. Cambodia, (+ Understudies who are getting ready for Online/Offline Tests/Contests in Chemistry for class 12. 355) Determine the value of the missing equilibrium constant. A. ion-ion Bahrain, (+ +25.5 kJ B. E. H3O+. Note: Names of real elements have been changed to 'Xx' and 'Xa'. (i) The value of K increases as the system approaches equilibrium. What is dynamic equilibrium? C) The equilibrium partial pressure of Br2 will be greater than 1.00 atm. B) increase the partial pressure of CO2 (g) After equilibrium was reached, the partial pressure of NO dropped to 320 torr. Additionally, you can reconsider all Chemistry sections appropriately whenever and save significant season of yours during class tests and yearly tests readiness.

Barnes And Noble Board Of Directors, Ross Johnson Wife Laurie, Articles I