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[The decomposition of SO2Cl2 is first order in SO2Cl2 and has a rate constant of 1.46104 s1 at a certain temperature] So, visit our site and easily find MCQs for all subjects classwise. 92) D) only products are present [Suppose that 1.10 g of rubbing alcohol (C3H8O)] 960) A) 5.26 10-20 Mauritius, (+ 46) PDF Chapter 15 Practice Questions - umb.edu Equilibrium Constant Kp: Expression, Equation | StudySmarter Understudies who are planning for Central board assessments in Chemistry specifically CBSE, ICSE, and NIOS Board. For the reaction given in Part A, how much heat is absorbed when 2.80 mol of A reacts? C) K does not depend on the concentrations or partial pressures of reaction components. B. Q: Which acid is stronger? A) increase the rate of the forward reaction only The equilibrium constant for the reaction H2+I2<->2HI is 54.8 at 425 Zimbabwe, (+ C. 16.6 kJ C. -486 kJ The equilibrium-constant expression depends on the _____ of the reaction. B) increase the partial pressure of CO2 (g) Georgia, (+ Maldives, (+ 2CO2 (g) 2CO (g) + O2 (g) H = -514 kJ Check all that apply. E. -24.5 kJ, Calculate the amount of heat (in kJ) required to raise the temperature of a 79.0 g sample of ethanol from 298.0 K to 385.0 K. The specific heat capacity of ethanol is 2.42 J/gC. United Arab Emirates, (+ Egypt, (+ B. D. The value of K remains, but the equilibrium is shifted towards more products. A. ethanol 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. The reverse reaction is favored. C. Neither direction is favored. A 43.9-g piece of copper (C_Cu= 0.385 J/gC) at 135.0C is plunged into 254 g of water at 39.0C. 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. Oman, (+ B. Determine the value of the missing equilibrium constant. D. TP and CP are always at the same pressure. 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. Test your critical thinking abilities by noting the Chemistry Multiple Choice Questions with Answers for Class 12 PDF all alone. This problem has been solved! C) 5.4 1013 After equilibrium was reached, the partial pressure of NO dropped to 320 torr. -25.5 kJ Pakistan, (+ United Kingdom, (+ What happens to the vapor pressure of a substance when the temperature is increased? (look up carbon dioxide phase diagram), Which of the following compounds is most soluble in hexane (CH3CH2CH2CH2CH2CH2CH3)? [The reaction X products is second order in X and has a rate constant of 0.035 M1s1] Count the number of atoms of each element on each side of the equation and verify that all elements and electrons (if there are charges/ions) are balanced. 46) E) all of the above, 32) Consider the following reaction at equilibrium: A) products predominate 7) The equilibrium constant for reaction 1 is K. The equilibrium constant for reaction 2 is ________. C. 1-pentanol C. State functions do not depend on the path taken to arrive at a particular state. Bahrain, (+ Or if any of the following reactant substances I2 (iodine), disappearing (look up phase diagram). B. 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] Understudies who are concentrating in CBSE, ICSE, IGCSE schools as well as different State Board schools. 1/2 N2(g) + O2(g) NO2(g) Hrxn = +33 kJ [Nickel and aluminum electrodes are used to build a galvanic cell. To score well take a stab at rehearsing the rundown of Multiple Choice Type Questions gave in the connections underneath. is given by, 21) The equilibrium constant for the gas phase 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. After the reaction reaches equilibrium, the total pressure is 2.65 atm.] 3. D. ion-dipole 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. Portugal, (+ If the equilibrium constants for the formation of H S from H 2S is 1.0 107 and that of S 2 from H S ions is 1.2 1013 then the concentration of S 2 ions in aqueous solution is - JEE Main 2018 9. United Arab Emirates, (+ The equilibrium constant (K ) would be __________. A2 (g) 2 A (g). The heat capacity of the calorimeter is 4.90 kJ/C. 968) C) addition of some to the reaction vessel (V and T constant) 358) When a reactio. 15.5: Calculating Equilibrium Constants - Chemistry LibreTexts C. 50.0 g Al, CAl = 0.903 J/gC D) 100 D. If the temperature is raised, then the reverse reaction is favored. In chemical equation H2(g) + I2(g) 2HI(g), the equilibrium Kp depends C. 0.222 [A silver block, initially at 58.8 C, is submerged into 100.0 g of water at 25.0 C, in an insulated container. A. What is the mole fraction xA of liquid A in this mixture. A. C) N2 (g) + 2O2 (g) 2NO2 (g) E. In equilibrium, the ratio [P] / [A] is equal to k / k'. E. 9.40, A mixture containing 20.6 g of ice (at exactly 0.00 C) and 70.3 g of water (at 62.9 C) is placed in an insulated container. What is the specific heat of benzene? - The relationship between vapor pressure and temperature is not linear, but rather, it is exponential. D) only products are present The equation for the dissociation of hypochlorous acid is: From Midterm 3: Determine the pH value at 25C for a 0.062 M solution of a base that is 100% dissociated. B. Intramolecular forces C. 0.037 A. H2(g) A. K<1 H2 + I2 = HI - Chemical Equation Balancer 351) 230) C. 11.70 If you have any query regarding CBSE MCQs, drop a comment below and we will get back to you at the earliest. 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. A. D. H3PO4 968) 234) is Keq = 230 at 300 C. * Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project A) 5.4 10-13 B. HPO42- A(g) + 2B(g) AB2(g) Kc = 59 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] Determine the value of the missing equilibrium constant. By using Laplace transforms, solve the following differential equations 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 Xd(s) | Xd2+(aq) || H+(aq) | H2(g) | Pt D. 456 kJ In chemical equation H2 (g) I2 (g) 2HI (g) the equilibrium constant 355) B) 1.56 104 New Zealand, (+ H2 (g) + I2 (g) 2HI (g) What is the boiling point of water at an elevation of 1.00104 ft ? Chemistry MCQ For Class 12 Chapter astute with Answers PDF Download. C. OH- 90) -1282 kJ C. N2 For H2O, Hfus = 6.01 kJ/mol, and Hvap = 40.67 kJ/mol. 268) 2CO2 (g) 2CO (g) + O2 (g) H = -514 kJ Consider the following reaction: H2 (g) + I2 (s) ---> 2HI (g) TriangleH 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. Consider an acetate buffer that is a mixture of 0.20 M acetic acid and 0.20 M sodium acetate. Hungary, (+ -333 kJ D. 12.9 kJ A) N2 (g) + 3H2 (g) 2NH3 (g) Portugal, (+ United Kingdom, (+ 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? What is the value of Keq at this temperature for the following reaction? The equilibrium constant is given for one of the reactions below. Donald A. McQuarrie, Ethan B Gallogly, Peter A Rock, Edward Atkins, Julio de Paula, Peter Atkins. C. N(g) 2 HBr(g) H2(g) + Br2(g) Kc = ? 91) 17-2 The value of Q increases as a function of time until it reaches the value of K. b) No, Q would still increase with time because the [I2] would decrease in exactly the same way as [H2] decreases. Write the overall balanced equation for the reaction. 348) b. You can likewise reconsider all Chemistry sections appropriately and save time during your group tests and tests. [Like all equilibrium constants, the value of Kw depends on temperature. B. [Acid rain over the Great Lakes has a pH of about 4.6.] France, (+ 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. 82) O=O 498 H2 (g) + I2 (g)-- > < -- 2HI(g) H=-10.4 kJ. New Zealand, (+ D. 5.11 2A+B2C+2D B) N2O4 (g) 2NO2 (g) A 250 mL sealed flask contains 0.65 g of butane at 22C.] 91) 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. Equilibrium hydrogen is defined as a sample of hydrogen existing at the equilibrium ratio of orthohydrogen-parahydrogen at a given temperature (shown by the crimson dash-dot line in the figure). 977) 12.72 (R = 0.0821 L atm/ (K mol)) A. -2.16C 90) Download the Study24x7 App, so you can connect and collaborate. Let us consider that one mole of H2 and one mole of I2 are present initially in a vessel of volume V dm3. 0.043 Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. B. removing O2 Q: Find the value of the [H3O+] of rain over the West Coast that has a pH of 5.5. A. Rehearsing NCERT Online Chemistry MCQ Questions for Class 12 with Answers is perhaps the most effective way to plan for the CBSE Class 12 board test. C. 62.5C It is the best methodology to chip away at the finished result. What state transition or transistions occur in carbon dioxide if you begin with a sample of carbon dioxide at 60.0 C at 50.0 atm and warm the sample to 10.0 C and 50.0 atm? C) [SO3]2 / [SO2]2[O2] B. Ukraine, (+ Determine the value of the missing equilibrium constant. Turkey, (+ The total number of stars for this article is: 5 in 1 review. D) increase the rate at which equilibrium is achieved without changing the composition of the equilibrium mixture 107 g C. H3O+/OH- Saudi Arabia, (+ For the reaction H 2( g )+ I 2( g ) longrightarrow 2 HI ( g ), the Beside the PDF archive of Chemistry we are giving the electronic test which will help in everyday act of the Mathematical Problems. - 1.92 x 103 kJ/mole The enthalpy of a reaction can be calculated from the heats of formation of the substances involved in the reaction: D. The value of pH is somewhat lower than 2.13. Nepal, (+ [Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 C. Essentt - Handpicked Products. PDF Calculation the Equilibrium Constant - Oklahoma State University Afghanistan, (+ The molar mass of sugar is 342.3 g/mol. Cambodia, (+ B. Q: What is the theoretical cell potential assuming standard conditions? [A solution contains a mixture of pentane and hexane at room temperature. A. For the reaction, H2(g) + I2(g) 2HI(g) , the equilibrium constant Kp H2(g) + I2(g) . 2HI = H2 + I2 | Chemical Equation. Energy can be transferred in many ways, one of which is in the form of work. [Calculate the freezing point and boiling point in each solution, assuming complete dissociation of the solute] Part C: Calculate the change in the internal energy of the system, E. The forward reaction is favored. Pakistan, (+ (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) N2O4 (g) 2NO2 (g) Mexico, (+ (Remember that 101.3 J = 1 L atm) Note: Names of real elements have been changed to 'Xx' and 'Xa'. From Midterm 3: 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. PDF 5.9 10 -3 - gccaz.edu Top 2 posts Page 1 of 1 44) - A gas can be converted into a liquid by increasing the pressure of a gas sample. United States, (+ H2 (g) + I2 (g) <------------------> 2 HI (g) We hope the given NCERT MCQ Questions for Class 12 Chemistry PDF Free Download will definitely yield fruitful results. 992) (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. 52) C. Xd2+ + 2 H+ Xd + H2 5.99 torr 4.19 49) 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). B. 234) 995) (ii) The value of K decreases as the system approaches equilibrium. 10 31) Chemistry MCQ For Class 12 Chapter keen with Answers are a huge resource for the board test arranging. - A liquid can be converted to a gas by cooling. Q: Assuming ideal behavior, what is the concentration of the solute within the solution in mole percent? 92) In chemical equation H2(g) + I2(g) 2HI(g), the equilibrium Kp depends on. B. 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) Ghana, (+ 2SO2 (g) + O2 (g) 2SO3 (g) Nepal, (+ D) At equilibrium, the total pressure in the vessel will be less than the initial total pressure. B.54.4 J This equilibrium is an exothermic one. After 203 s the concentration of A had fallen to one fifth of the initial value. A constant horizontal force of 290N290 \mathrm{~N}290N is applied to the crate to push it up the ramp. PPT PowerPoint Presentation 33) CH4(g)+Cl2(g)CH3Cl(g)+HCl(g), H=99.60 kJ The equilibrium constant K will increase above 2.010-3 (answer is debatable), From Midterm Exam 2: [An aqueous solution contains 32% HCl by mass] D.2.08 10-2 J . Determine the value of . A B + C O-H 464 Consider the first-order decomposition of compound A according to The concentration [A] was measured at two different times: at t1 = 19.4 s the concentration of A was [A]1 = 0.62 M and at time t2 = 60.8 s the result was [A]2 = 0.31 Swaziland, (+ For a chemical equilibrium reaction H2(g) + I2(g) 2HI(g) Tajikistan, (+ 2A(g) + 2B(g) A2B2(g) Kc = 28.2. Hungary, (+ South Africa, (+ Here's an example. Q: How much heat is produced by the complete reaction of 4.05 kg of nitromethane? Swaziland, (+ Catalysts have no effect on equilibrium situations. 7) A) N2 (g) + 3H2 (g) 2NH3 (g) The pH of a solution of boric acid, H3BO3(aq), with Ka = 5.410-10 has been found to have a value of 5.02. B. Comprehend the ideas and practice Objective Type Questions for twelfth Class Chemistry however much you can to score well. C-O 360 It changes only with changes in temperature of the system. Georgia, (+ The reaction mixture will contain [A]=0.1M and [B]=1.0M. A. India, (+ Give the direction of the reaction, if K >> 1. 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. The isomerization of methylisonitrile to acetonitrile This buffer has a pH = 4.74. The reaction mixture will contain [A]=1.0M and [B]=0.1M. A) [NH3][H2Se] / [(NH4)2Se] - A gas can be converted into a liquid by heating. Which statement applies to the equilibrium of this reaction after the pressure is changed to 2 bar, but with the temperature remaining at 30C ? Understudies who wish to hone their insight into Chemistry. D) [SO3]2 / [SO2]2[O2]2 41) A. Part A: What is the value of E for the combustion of the fuel? Equilibrium Constant Kp Definition And Examples - Chemistry Dictionary B. hydrogen bonding 20) A. HI(g)12H2(g)+12I2(g), The equilibrium constant is given for one of the reactions below. Germany, (+ Considering H2(g) + I2(g) 2HI and a temperature of 731K; 2.40 mol of Which statement is true of an endothermic reaction? When a liquid evaporates in a closed container, molecules with relatively higher kinetic energy escape the liquid surface into the vapour phase and number of liquid molecules from the vapour phase strike the liquid surface and are retained in the liquid phase. Based on the freezing point depression constant for water, Kf = 1.86 K /(mol kg-1), what is the freezing temperature of the mixture. C) 6.44 105 CBSE MCQs for all the classes and subjects are provided online or you can view them on our site. C. 2.13 10-14 B) 0.50 Netherlands, (+ E. Xe. C) N2 (g) + 3H2 (g) 2 NH3 (g) Nigeria, (+ [The decomposition of SO2Cl2SO2Cl2 is first order in SO2Cl2SO2Cl2 and has a rate constant of 1.46104 s1s1 at a certain temperature] Maldives, (+ South Korea, (+ A. C. dipole-dipole Georgia, (+ At body temperature (37C), Kw=2.41014] [The heat of combustion of CH4 is 890.4 kJ/mol and the heat capacity of H2O is 75.2 J/molK] B. In chemical equation H2(g) + I2(g)2HI (g) the equilibrium constant Kpdepends onSee more. Q: If the initial concentration of SO2Cl2 is 1.00 M, how long will it take for the concentration to decrease to 0.72 M ? Bond Bond Energy (kJ/mol) The Kc constant shows that the ratio of products to reactants is very small, indicating that a much higher concentration of reactants exists compared to the concentration of products. For both acid and base, 'strong' means fully dissociated. Q: What is the percent ionization of ammonia at this concentration? 351) Q: What is the pH of a 0.240 M ammonia solution? Asked by sumandeesinghrana | 12 Oct, 2010, 03:00: PM Expert Answer Dear Student For the reaction H 2 + I 2 --------> 2HI 41) C. surface tension B. B) reactants predominate A. Turkey, (+ Part A: How much butane is present as a liquid at 22C? C) 2 SO3 (g) 2 SO2 (g) + O2 (g) M. What is the half-life, t1/2, for this reaction in units of seconds ? 2COF2(g)CO2(g)+CF4(g), Kc=6.30 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.

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