(ii) The value of K decreases as the system approaches equilibrium. Hydrogen iodide undergoes decomposition according to the equation 2HI (g) H2 (g) + I2 (g) The equilibrium constant Kp at 500 K for this equilibrium is 0.060. B. [Nitromethane (CH3NO2) burns in air to produce significant amounts of heat. Georgia, (+ D. all of the above D) only products are present 6 H2(g) + 6 D2(g) 12 HD(g) Kc = ? 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. Which metal ion in the list is most difficult to reduce? 93) Determine the value of the missing equilibrium constant. y+4y+5y=26e3t,y0=1,y0=5.y^{^{\prime \prime }}+4y^{^{\prime [An aqueous solution contains 32% HCl by mass] New Zealand, (+ Which of the following substances would you predict to have the highest Hvap? B. CP is always at a higher temperature relative to TP. 2.34 10-7 Swaziland, (+ - 1.92 x 103 kJ/mole A compound is found to have a molar mass of 598 g/mol. 90) C-O 360 A2B(g) + B(g) A2B2(g) Kc = 16.4 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. Saudi Arabia, (+ The isomerization of methylisonitrile to acetonitrile 973) Denmark, (+ Georgia, (+ 380) A second-order reaction of the type 2A P was carried out in a solution with the initial concentration of A being [A]0 = 1.5 mol L-1. (look up carbon dioxide phase diagram), Which of the following compounds is most soluble in hexane (CH3CH2CH2CH2CH2CH2CH3)? C) 7.07 An analyte containing 0.12 L of a 0.025 M solution of a strong acid is titrated with a 0.220 M solution of a strong base. 11.90 By rehearsing more second Year Chemistry MCQs with Answers Pdf Download, understudies can work on their speed and exactness which can help them during their board test. E. 73.6 kJ, It takes 11.2 kJ of energy to raise the temperature of 145 g of benzene from 23.0C to 68.0C. -69.8 J mol-1 - A gas can be converted into a liquid by cooling. Answer 2.35 x 104 kJ/mole 2003-2023 Chegg Inc. All rights reserved. 91) A. While the crate is moving, the ramp exerts a constant frictional force on it that has magnitude 65.0N65.0 \mathrm{~N}65.0N. (a)(a)(a) What is the total work done on the crate during its motion from the bottom to the top of the ramp? 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. A. Xd + 2 H+ Xd2+ + 2 H2 [The reaction X products is second order in X and has a rate constant of 0.035 M1s1] 977) Hydrogen and iodine react to form hydrogen iodide, like this: H_2 (g 1/2 N2(g) + O2(g) NO2(g) Hrxn = +33 kJ 90) 44) The value of pH is somewhat higher than 6.65. 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. What is the value of Keq for the following reaction? New Zealand, (+ Mexico, (+ Oman, (+ 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. Which of the following is NOT a conjugate acid-base pair? An equilibrium mixture contains 2 moles of sulphur dioxide, 1 mole of oxygen and 6 moles of sulphur trioxide. 27) 971) H2 + I2 = HI - Chemical Equation Balancer A -253 Le Chtelier's principle predicts that a decrease in temperature will ________. Q: What is the mole fraction of hexane? Bangladesh, (+ B) reactants predominate 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} C. CF4 If 35.8 mg of the compound is dissolved in enough water to make 175 mL of solution at 25C, what is the osmotic pressure of the resulting solution? 26) Which of the following statements is true? Pakistan, (+ Penguins??] It changes only with changes in temperature of the system. India, (+ (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. B) [(NH4)2Se] / [NH3]2[H2Se] Determine the value of the missing equilibrium constant. 3.48 J/(g C) Nepal, (+ but the same value of Kc will be obtained at a given temperature. A. +25.5 kJ is Kp = 7.0. E) The reaction will go to completion since there are equal amounts of Br2 and Cl2. CBSE Textbooks can be great to guide you for any exam and has detailed solutions for the questions. E) only reactants are present, 24) The equilibrium constant for the gas phase reaction D -511. A. viscosity United Kingdom, (+ Q: What is the mass of the silver block? 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) 5.4 10-13 MCQ Questions for Class 12 Chemistry Chapter 4 Chemical - CBSE MCQ Saudi Arabia, (+ A. 15.2: The Equilibrium Constant (K) - Chemistry LibreTexts Substance Hf (kJ/mol) D) 2N2 (g) + O2 (g) 2 O (g) 977) The equilibrium constant expression for the reaction is Kc = [HI]2 [H2][I2] Substituting the equilibrium concentrations into the equilibrium expression, Kc = (0.30)2 (0.012)(0.15) = 50 The magnitude of the equilibrium constant is 50 for the temperature at which the data was collected. B) increase the partial pressure of CO2 (g) Part B: Calculate the boiling point of the solution above. 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 \mathrm{Cu}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightleftharpoons \mathrm{Cu}(\mathrm{s}) & \text { voltage }=+0.34 \mathrm{~V} \\ \mathrm{Ag}^{+}(\mathrm{aq})+\mathrm{e}^{-} \rightleftharpoons \mathrm{Ag}(\mathrm{s}) & \text { voltage }=+0.80 \mathrm{~V} \\ B) reactants predominate h) A ask is sealed at 600 K 1with partial pressures of Hg = 2.50 atm and I g = 1.27.0 am. E) The reaction is at equilibrium when Q = Keq. HOCl(aq) + H2O(l) H3O+(aq) + OCl-(aq). with forward (A P) rate constant k and reverse (A P) rate constant k' is correct? Half-reaction reaction potentials you might need are: There is not a viable replacement for steady practice whether one needs to comprehend an idea completely or one needs to score better. CBSE Class 10 Answered - TopperLearning 1) In chemical equation H2 (g) + I2 (g) 2HI (g) the equilibrium constant Kp depends on See more A total pressure B catalyst used C amount of H2 and I2 D Temperature Submit Class 12 (PCB) Class 12 (PCM) Like Comment Share Write a comment 500+ more Questions to answer Popular Courses FREE How to start preparing for IIT from Class 10th A) [HF][H2O] / [H3O+][F-] D. 1.2 We hope the given NCERT MCQ Questions for Class 12 Chemistry PDF Free Download will definitely yield fruitful results. Compute the pH at 25C after 3 mL of the base has been added. 48) D) increase the rate at which equilibrium is achieved without changing the composition of the equilibrium mixture [The reaction X2(g)2X(g) occurs in a closed reaction vessel at constant volume and temperature. 880) Q6. D. capillary action Terms T&C. Part A: What is the value of E for the combustion of the fuel? There is not a viable replacement for reliable practice whether one needs to comprehend an idea completely or one needs to score better. Afghanistan, (+ The equilibrium constant (K ) would be __________. - A gas can be converted into a liquid by increasing the pressure of a gas sample. B. D.2.08 10-2 J B. SiH4 C=O 799 An aqueous solution contains 0.10M H 2S and 0.20M H Cl . Cambodia, (+ Albania, (+ It will assist you with knowing regardless of whether your arrangement is continuing the correct way. The equilibrium constant for the formation of hydrogen iodide according to to given equation is K. H2 + I2 2HI Find the equilibrium constant in terms of K for the reaction: HI 1/2 H2 + 1/2 I2 Please explain. What is the specific heat of benzene? 82) PDF Equilibrium- HW - NJCTL The equilibrium constant is given for one of the reactions below. Assuming no loss of heat to the surroundings, what is the final temperature of the mixture? B) 2500 A. B -423 Q: Find the value of the [H3O+] of rain over the West Coast that has a pH of 5.5. 48.6 C Egypt, (+ Calculate the standard cell potential, Ecell, for the cell defined by the reaction 855) After the reaction reaches equilibrium, the total pressure is 2.65 atm.] D) 2HI (g) H2 (g) + I2 (g) Xx+(aq) + e-(aq) Xx(s) , These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE. E. In equilibrium, the ratio [P] / [A] is equal to k / k'. Ti (s) + 2Cl2 (g) TiCl4 (l) 92) India, (+ South Korea, (+ 7) C) N2 (g) + 3H2 (g) 2 NH3 (g) C) The reaction is at equilibrium when Q < Keq. C. 1-pentanol D. +473 kJ B. Assuming that no heat is lost to the surroundings, what will the final temperature of the system be? 52) is Keq = 2.80 102 at 999 K. At equilibrium, ________. D. 6.36 torr 49) By rehearsing more second Year Chemistry MCQs with Answers Pdf Download, understudies can work on their speed and precision which can help them during their board test. B.54.4 J For H2O, Hfus = 6.01 kJ/mol, and Hvap = 40.67 kJ/mol. 2075 It permits everybody to download CBSE Class 12 Chemistry Chapter-wise MCQs question keep money with addresses in free pdf organization and practice them for additional investigations. Q: Which acid is stronger? C. Dynamic equilibrium in a chemical reaction is the condition in which the rate of the forward reaction equals the rate of the reverse reaction. 46) A. ion-ion NO(g)+12Br2(g)NOBr(g)Kp=5.3 A) products predominate 234) Which one statement regarding the first-order reaction 2 Xs(s) + 3 Xn2+(aq) 2 Xs3+(aq) + 3 Xn(s) . 992) 2HI = H2 + I2 | Chemical Equation. (Methanol ( CH3OH ) contains hydrogen directly bonded to oxygen, so it has hydrogen bonding. D) The reaction is at equilibrium when Q > Keq. Thank you for your participation! 977) Answered: For the following reaction, 2HI(g) --> | bartleby Rehearsing NCERT Online Chemistry Objective Questions For Class 12 Pdf Answers is perhaps the most ideal way to plan for the CBSE Class 12 board test. Turkey, (+ Consider the chemical equation and equilibrium constant at 25C: Test - Regents A. 960) C) roughly equal amounts of products and reactants are present 6.41 (look up phase diagram). A. N2(g)+O2(g)+Br2(g)2NOBr(g). subject to the given initial conditions. So, visit our site and easily find MCQs for all subjects classwise. 358) Finland, (+ Identify the change that will always shift the equilibrium to the right. Utilizing the assets accessible you can score well in the test. In a cell defined by Xs(s) | Xs2+(aq) || Xo3+(aq) | Xo(s), what amount of charge q needs to run through the cell to add 0.25 g of Xo(s) with atomic mass 107 g mol-1 to the electrode. H2(g)+I2(g)2HI(g) , K=6.2102 Calculate the equilibrium constant How reactions can happened and produce H2 (hydrogen) and I2 (iodine) ? Note: Names of real elements have been changed to 'Xs' and 'Xo'. Tajikistan, (+ D. Xd + H+ Xd2+ + H2 + Pt 0.093 M Chemistry MCQ For Class 12 Chapter astute with Answers PDF Download. Understudies who are getting ready for Online/Offline Tests/Contests in Chemistry for class 12. Q.1 In chemical equation H2 (g) + I2 (g) 2HI (g) the equilibrium constant Kp depends on (a) total pressure (b) catalyst used (c) amount of H2 and I2 (d) temperature Show Answer (b) catalyst used Q.2 If the rate of a reaction is expressed by, rate = A [A] [B], the order of reaction will be (a) 2 (b) 3 (c) 1 (d) 0 Show Answer (b) 3 D. 13.16 Maldives, (+ 52) B. 82) C) at low temperature and low pressure E. All of the above are conjugate acid-base pairs. Q: Pb2+(aq)+Mg(s)Pb(s)+Mg2+(aq). By using Laplace transforms, solve the following differential equations
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