C. remove reactant D) At equilibrium, the total pressure in the vessel will be less than the initial total pressure. A) [HF][H2O] / [H3O+][F-] C. 1-pentanol Le Chtelier's principle predicts that the equilibrium partial pressure of CO (g) can be maximized by carrying out the reaction ________. What is the specific heat of benzene? Q: At what temperature does benzene boil when the external pressure is 460 torr ? E. All of the above are true. 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 ? - A liquid can be converted to a gas by heating. 107 g A) products predominate Nepal, (+ and 2SO2 (g) + O2 (g) 2SO3 (g) 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 Calculate K and Kp for this reaction. (b)(b)(b) How much time does it take the crate to travel to the top of the ramp? Which metal ion in the list is most difficult to reduce? A. Xd + 2 H+ Xd2+ + 2 H2 995) Two liquids, labeled A and B, form an ideal mixture with total vapor pressure P = 324.4 torr at a certain composition. 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. B. The best strategy to follow while answering the MCQ Questions for exams is to go through the question as many times as possible and understand it clearly. HNO2 4.6104 D. TP and CP are always at the same pressure. Which one statement regarding the first-order reaction B. South Korea, (+ From Midterm 3: If the value for K = 2.1 X10-2 at 730 K, which substance predominates, HI or H2 and I2 Consider the chemical equation and equilibrium constant at 25C: D. The value of pH is somewhat lower than 2.13. B. C) The reaction is at equilibrium when Q < Keq. A) N2O4 (g) 2NO2 (g) (i) The value of K increases as the system approaches equilibrium. 2 Xs(s) + 3 Xn2+(aq) 2 Xs3+(aq) + 3 Xn(s) . If only COF2 is present initially at a concentration of 2.00 M, what concentration of COF2 remains at equilibrium? What is the best strategy while answering the Multiple Choice Questions for exams? A) The reaction quotient must be satisfied for equilibrium to be achieved. D. Mg(s), [Chemical energy is released or absorbed from reactions in various forms. 41) 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. For the comforts of the understudies we have furnished the part savvy Chemistry MCQs with replies here. From Midterm 3: D. 1, The equilibrium constant is given for two of the reactions below. Egypt, (+ The equation for the dissociation of hypochlorous acid is: 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. E) only reactants are present, 24) The equilibrium constant for the gas phase reaction B. Consider the following reactions,(a) H2(g) + I2(g) 2HI(g)(b) CaCO2(s) CaO(s) + CO2(g)(c) S(s) + 3F2(g) SF6(g), The value of Kc for the reaction 2HI (g) H2 (g) + I2 (g) is 1 10^4 At a given time, the composition of reaction mixture is. Or if any of the following reactant substances I2 (iodine), disappearing C. Xd2+ + 2 H+ Xd + H2 What is the vapor pressure of propane at 25.0 C? Pakistan, (+ Le Chtelier's principle predicts that the moles of in the reaction container will increase with ________. 968) E. -91 kJ, Identify an element that is NOT in its standard state. From Midterm 3: A. O2 Hungary, (+ B. Hrxn can be determined using constant pressure calorimetry. A reversible reaction can proceed in both the forward and backward directions. Spain, (+ . 2 NO (g) N2 (g) + O2 (g). 57.0 kJ D. If the temperature is raised, then the reverse reaction is favored. A. C. 62.5C 230) United Kingdom, (+ C) 5.4 1013 Mexico, (+ 46) 973) The equilibrium constant (Kp) for the interconversion of PCl5 and PCl3 is 0.0121: PCl5 (g) PCl3 (g) + Cl2 (g) . E) in the presence of solid carbon, 35) The effect of a catalyst on an equilibrium is to ________. D. capillary action New Zealand, (+ CH3Cl(g)+Cl2(g)CH2Cl2(g)+HCl(g), H=105.8 kJ, Use the standard reaction enthalpies given below to determine Hrxn for the following reaction: D. 1.85 A 20.0kg20.0 \mathrm{~kg}20.0kg crate sits at rest at the bottom of a 15.0m15.0 \mathrm{~m}15.0m long ramp that is inclined at 34.034.0^{\circ}34.0 above the horizontal. 28.4 kJ 2.65 C) at low temperature and low pressure This multitude of MCQs with answers are delivered by subject specialists for a wide range of understudies. A -253 What is the value of Keq for the following reaction? Provide your answer in units of mol L-1. India, (+ Determine the value of . Germany, (+ C. 50.0 g Al, CAl = 0.903 J/gC B) H2 (g) + Cl2 (g) 2 HCl (g) B. AB2(g) + B(g) AB3(g) Kc = ? D. -0.91C D. -150. kJ E. +4087 J mol-1, From Midterm Exam 2: Q: What is the half-life for this reaction? y+4y+5y=26e3t,y0=1,y0=5.y^{^{\prime \prime }}+4y^{^{\prime 82) d. Which metal ion in the list is the easiest to reduce? Guinea, (+ B. K=0 . To score well take a stab at rehearsing the rundown of Multiple Choice Type Questions gave in the connections underneath. 1-propanol B. From Midterm 3: Belgium, (+ Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. 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. Understudies who are concentrating in CBSE, ICSE, IGCSE schools as well as different State Board schools. 268) Q: What is the mass of the silver block? 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. Georgia, (+ 7) The equilibrium constant for reaction 1 is K. The equilibrium constant for reaction 2 is ________. B. PART A: [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? A) Q does not change with temperature. Pakistan, (+ Phenomenon after H2 (hydrogen) reacts with I2 (iodine) This equation does not have any specific information about phenomenon. Explain why chlorine occurs as diatomic molecules in nature rather than individual atoms. A P C. raising the temperature Another example of a chemical equation that can be used to explain is given below: Equation: 2 S O 2 ( g) + O 2 ( g) 2 S O 3 ( g) Equilibrium Constant: K C = [ S O 3] 2 [ S O 2] 2 [ O 2] Moreover, in terms of finding equilibrium constant for gases, partial pressure is taken into account. 27) The NCERT Solutions for the questions are present on our site or you can find them online too. 2NO(g)N2(g)+O2(g)Kp=2.11030 At equilibrium, ________. 20) Even though metal is a good conductor, frost can be seen on parked cars in the early morning even when the air temperature is above freezing. It can be represented as. C. 2.8 10-5 M 64) 348) 6 H2(g) + 6 D2(g) 12 HD(g) Kc = ? The equilibrium-constant expression depends on the _____ of the reaction. From Midterm Exam 2: E) none of the above, 12) The Keq for the equilibrium below is 50. \mathrm{Zn}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightleftharpoons \mathrm{Zn}(\mathrm{s}) & \text { voltage }=-0.76 \mathrm{~V} Part A: How much butane is present as a liquid at 22C? Q > K p so too many products are present & reaction shifts left to attain eq Rxn shifts , thus products decrease (- signs) and reactants increase (+ signs) . 12.30 E. none of the above. 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. Terms T&C. Propane has a normal boiling point of 42.0C and a heat of vaporization (Hvap) of 19.04 kJ/mol. CBSE Textbooks can be great to guide you for any exam and has detailed solutions for the questions. 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. 224) Mauritius, (+ Which statement is true of an endothermic reaction? C. +873 J mol-1 Half-reaction reaction potentials you might need are: N2(g) + O2(g) 2 NO(g) Hrxn = +183 kJ Exams . Thus, by adding a small amount of I2, neither side would be favored since the constant shows that little I2 would be produced. Answer When a reactio. The formation of HI from H2 and I2 is an example of gaseous homogeneous equilibrium reaction. (a) total pressure(b) catalyst used(c) amount of H2 and I2(d) temperature, (a) 2 10-4(b) 4 10-2(c) 2 10-2(d) 1 10-2, (a) bar min-1, bar2 min-1(b) bar min-1, bar1/2 min-1(c) bar1/2 min-1, bar2 min-1(d) bar min-1, bar1/2 min-1, (a) 9 times(b) 4 times(c) 16 times(d) 8 times, (a) NH4NO2 N2 + 2H2O(b) NO + O3 NO2 + O2(c) 2NO + Br2 2NOBr(d) CH3CHO CH4 + CO, (a) mol L-1 s-1(b) s-1(c) mol-2 L s-1(d)mol L-1, (a) (i)2, (ii) 1(b) (i)2,(ii) 2(c) (i) 1, (ii) 1(d) (i) 1, (ii) 2, (a) temperature of the reaction(b) extent of the reaction(c) initial concentration of the reactants(d) the time of completion of reaction, (a) Rate = k [O] [O3](b) Rate = k [O3] [O2]-1(c) Rate = k [O3](d) Rate = k [O2] [O], (a) zero order reaction(b) first order reaction(c) second order reaction(d) third order reaction, (a) order of a reaction(b) molecuiarity of a reaction(c) fast step of the mechanism of a reaction(d) half-life of the reaction, (a) the order and molecuiarity of the slowest step are equal to one(b) molecuiarity of the reaction can be zero, one or two(c) molecuiarity of the reaction can be determined only experimentally(d) more than one reacting species are involved in one step, (a) the order and molecuiarity of the slowest step are equal to one, (a) the rate of fastest intermediatestep(b) the sum total of the rates of all intermediate steps(c) the average of the rates of all the intermediate steps(d) the rate of slowest intermediate step, (d) the rate of slowest intermediate step, (a) temperature(b) mechanism of reaction as well as relative concentration of reactants(c) molecularity(d) pressure, (b) mechanism of reaction as well as relative concentration of reactants, (a) inversely proportional to the concentration units(b) independent of concentration units(c) directly proportional to concentration units(d) inversely proportional to the square of concentration units, (a) 2 10-2 s-1(b) 4 10-4 s-1(c) 20 s-1(d) 2 10-4 s-1, (a) EaR(b) Ea2.303R(c) 2.303Ea.R(d) Ea2.303, (a) mol L-1s-1(b) s-1(c) L mol-1s-1(d) L2mol-2s-1, (a) triple(b) increase by a factor of 4(c) double(d) remain unchanged. a. E. dispersion. Which one? Albania, (+ B. E) none of the above, 15) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? Ghana, (+ E. 25.0 g Au, CAu = 0.128 J/gC, Calculate the change in internal energy (E) for a system that is giving off 25.0 kJ of heat and is changing from 18.00 L to 15.00 L in volume at 1.50 atm pressure. C. 22.1 kJ mol-1 9) The equilibrium expression for Kp for the reaction below is ________. A reaction of the type 2A P has the following rate law: rate = k[A]2. Equilibrium is when the rate of the forward reaction equals the rate of the reverse reaction. C) 7.07 B. - A gas can be converted into a liquid by decreasing the pressure of a gas sample. 351) 973) D -511. 0.093 M CH3NC(g) CH3CN(g) United Kingdom, (+ HI(g)12H2(g)+12I2(g), The equilibrium constant is given for one of the reactions below. The forward reaction is favored. Based on the freezing point depression constant for water, Kf = 1.86 K /(mol kg-1), what is the freezing temperature of the mixture. E) -50, 13) The Keq for the equilibrium below is 50. 2NH 3 (g) N 2 . One of these substances is a liquid at room temperature. A. D) [SO3]2 / [SO2]2[O2]2 6.41 [Ammonia, NH3, is a weak base with a Kb value of 1.8105.] Cambodia, (+ 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. C. 12.28 Both TP and CP are located on the solid/liquid phase boundary. So Kp = (PH2) x (PI2) / PHI^2 P = partial pressure C. 0.00048 An aqueous solution contains 0.10M H 2S and 0.20M H Cl . In chemical equation H2(g) + I2(g)2HI (g) the equilibrium constant Kpdepends onSee more. E. 0.158. A. PO43- H2 (g) + I2 (g) 2HI (g) India, (+ Explain this phenomenon, keeping in mind that sound is reflected from the surface of the water and that the temperature of the air just above the water's surface is usually less than that at a height of 10m10 \mathrm{~m}10m or 20m20 \mathrm{~m}20m above the water. E. -1.35C. 2 HBr(g) H2(g) + Br2(g) Kc = ? 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. CH4(g)+2Cl2(g)CH2Cl2(g)+2HCl(g) 2CO2 (g) 2CO (g) + O2 (g) H = -514 kJ A. Ghana, (+ Determine the value of the missing equilibrium constant. [The vapor above an aqueous solution contains 17.9 mg water per liter at 25 C] A. A. Erxn can be determined using constant volume calorimetry. If you have any queries regarding The Solid State CBSE Class 12 Chemistry MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon. C) [SO3]2 / [SO2]2[O2] E) only reactants are present, 22) The equilibrium constant for the gas phase reaction 855) What is the vapor pressure of propane at 20.0 C? Determine the equilibrium concentration, [H3BO3], of this weak acid in the solution. A. Which of the following statements is correct for the triple point (TP) and critical point (CP) of a material.
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