What is the value of Keq at this temperature for the following reaction? New Zealand, (+ Netherlands, (+ Hungary, (+ C) [H+][HCO3-] / [CO2][H2O] 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. Germany, (+ At equilibrium the total pressure in the container is 1.300 atm. 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. Hungary, (+ Understudies who are getting ready for designing and clinical selection tests like NEET, IIT JEE, AIIMS, JIPMER and SAT Exams in Chemistry. d. Which metal ion in the list is the easiest to reduce? 82) 348) The majority of the boards that prefer the NCERT Textbooks can use these Solutions for getting a grip on the subject. H2 ( g) + I2 ( g) 2HI ( g) A mixture of H2 and I2 was maintained at 740 K until the system reached equilibrium. 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). 224) C 185 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. \mathrm{Cu}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightleftharpoons \mathrm{Cu}(\mathrm{s}) & \text { voltage }=+0.34 \mathrm{~V} \\ 0.093 M A) The equilibrium partial pressures of Br2, Cl2, and BrCl will be the same as the initial values. Turkey, (+ C. 12.54 A. 20) What is the vapor pressure of propane at 20.0 C? 27) After 203 s the concentration of A had fallen to one fifth of the initial value. 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. This multitude of MCQs with answers are delivered by subject specialists for a wide range of understudies. The heat capacity of the calorimeter is 4.90 kJ/C. 263) NCERT Solutions and CBSE MCQs will provide you an in-depth understanding of all the questions and concepts in NCERT Textbooks. [The reaction X2(g)2X(g) occurs in a closed reaction vessel at constant volume and temperature. 32) Afghanistan, (+ Give the direction of the reaction, if K >> 1. 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. 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. At equilibrium, ________. 25) At 400 K, the equilibrium constant for the reaction 2NO(g)N2(g)+O2(g)Kp=2.11030 Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. Propane has a normal boiling point of 42.0C and a heat of vaporization (Hvap) of 19.04 kJ/mol. 7154 United Arab Emirates, (+ 880) All reactant and product concentrations are constant at equilibrium. C) N2 (g) + 3H2 (g) 2 NH3 (g) B. B. density After equilibrium was reached, the partial pressure of NO dropped to 320 torr. 2CH3NO2(l)+3/2O2(g)2CO2(g)+3H2O(l)+N2(g) Hrxn = -1418 kJ] For the equilibrium of the dissociation reaction of the compound 'A2', the concentrations were found to be [A2] = 0.022 M and [A] = 0.13 M at 25C: Portugal, (+ C. OH- A. A. 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. 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)? 233) For a chemical equilibrium reaction H2 (g) + I2 (g) 2HI(g) write an expression for Kp (and relate it to Kc). B. Example: 4.00 moles of HI are placed in an evacuated 5.00 L flask and then heated to 800 K. The system is allowed to reach What will be the equilibrium concentration of each species? A. O2 Cambodia, (+ 968) E. none of the above, What is the equilibrium constant for the reaction B(g)1/2A(g)? (ii) The value of K decreases as the system approaches equilibrium. 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. Detailed description of the questions is given by subject experts and you can use them as a reference during your preparation. [An aqueous solution contains 32% HCl by mass] How can I download the CBSE MCQs in PDF Format for free? B) 0.50 From Midterm Exam 2: Consider a cell that is built using the following two half-reactions, E) decrease the partial pressure of CO, D) increase the value of the equilibrium constant, 34) Consider the following reaction at equilibrium. C. The anomaly of carbon dioxide is that it has a CP but no TP. Two liquids, labeled A and B, form an ideal mixture with total vapor pressure P = 324.4 torr at a certain composition. 0.556 For both acid and base, 'strong' means fully dissociated. Spain, (+ The osmotic pressures required for this process can be as high as 18.6 atm . Part A: Calculate the freezing point of a solution containing 12.2 g FeCl3 in 160 g water. B. E) [H+][HCO3-], 18) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? C-H 414 CH4(g)+2Cl2(g)CH2Cl2(g)+2HCl(g) The specific heats of ice, water, and steam are 2.09 J/gK, 4.18 J/gK, and 1.84 J/gK, respectively. A. ion-ion D) 2 SO3 (g) 2 SO2 (g) + O2 (g) A. BF3 D. 7.2 10-4 M, Find the pH of a 0.390 M aqueous benzoic acid solution. B. Nepal, (+ C) N2 (g) + 2O2 (g) 2NO2 (g) Cambodia, (+ - A gas can be converted into a liquid by heating. South Korea, (+ 7.2 10-5 M Thus, by adding a small amount of I2, neither side would be favored since the constant shows that little I2 would be produced. 977) Germany, (+ 44) 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]. B) Keq does not change with temperature, whereas Q is temperature dependent. The reaction mixture will contain [A]=0.1M and [B]=1.0M. 2CO2 (g) 2CO (g) + O2 (g) H = -514 kJ What is the stoichiometric coefficient of Xx(s) in the balanced reaction equation for that cell ? 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Daily act of different subject shrewd MCQs will assist with fostering a solid comprehension of every theme which you will recollect till date of your tests. A. Understudies able to speed up and precision in settling these inquiries are expected to rehearse however much as could be expected. 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. For benzoic acid, Ka=6.5105. D) 2HI (g) H2 (g) + I2 (g) E) The reaction is at equilibrium when Q = Keq. E. The reverse reaction is favored. A) some removal of from the reaction vessel (V and T constant) [Benzene has a heat of vaporization of 30.72 kJ/mol and a normal boiling point of 80.1 C] Part A: Use the wattage of the lightbulb and the time it is on to calculate the heat transferred, q, in joules. D) 5.66 10-3 [The decomposition of SO2Cl2 is first order in SO2Cl2 and has a rate constant of 1.46104 s1 at a certain temperature] 64) 2 NO (g) N2 (g) + O2 (g). A) Q does not change with temperature. You can utilize the quick links on our page to view or download the CBSE MCQs of all classes in an easy way. Which metal in the list is the best reducing agent? Beside the PDF archive of Chemistry we are giving the electronic test which will help in everyday act of the Mathematical Problems. Which of the following is NOT a conjugate acid-base pair? Georgia, (+ E) -50, 14) Given the following reaction at equilibrium, if Kc = 1.90 1019 at 25.0 C, Kp = ________. VITEEE 2007: For the reaction H 2( g )+ I 2( g ) longrightarrow 2 HI ( g ), the equilibrium constant Kp changes with (A) total pressure (B) catalyst (VITEEE 2007: For the reaction H 2( g )+ I 2( g ) longrightarrow 2 HI ( g ), the equilibrium constant Kp changes with (A) total pressure (B) catalyst (Tardigrade - CET NEET JEE Exam App. South Africa, (+ C. 1-pentanol (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. (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. K<1 Part A: What is the value of E for the combustion of the fuel? Work, w, is the energy transferred when an object is caused to move a distance, d, against a force, F. Mathematically, we would write this as w=Fd. C. N2 2.35 x 104 kJ/mole 5.99 torr E) only reactants are present, 23) The equilibrium constant for the gas phase reaction Pakistan, (+ C) 2 SO3 (g) 2 SO2 (g) + O2 (g) Comprehend the ideas and practice Objective Type Questions for twelfth Class Chemistry however much you can to score well. D) Q does not depend on the concentrations or partial pressures of reaction components. HF (aq) + H2O (l) H3O+ (aq) + F- (aq) - A gas can be converted into a liquid by increasing the pressure of a gas sample. 2COF2(g)CO2(g)+CF4(g), Kc=6.30 B. Hrxn can be determined using constant pressure calorimetry. Germany, (+ Which change will shift the equilibrium to the left? E. 8.89. 2NH3 (g) N2 (g) + 3H2 (g) B. Guinea, (+ Find the equilibrium amounts of these compounds if they all start out at 0.120 M. Solution: Determine Qc so that you know which direction the reaction will proceed. 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} United Kingdom, (+ 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. C) addition of some to the reaction vessel (V and T constant) Part B: Calculate the work done, w. [A 100-W lightbulb is placed in a cylinder equipped with a moveable piston. B. b. C. 3.42 torr - The vapor pressure of a liquid increases with increasing temperature. 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. E. increase pressure, The following reaction is exothermic. 48) Q: Find the value of the [H3O+] of rain over the West Coast that has a pH of 5.5. The value of the equilibrium constant (Kp) as represented by the first chemical equation is 2.00 x 10-2 at 730 K. Calculate the value of the . 3.48 J/(g C) 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. E. There is not enough information to calculate the Kw. E) in the presence of solid carbon, 35) The effect of a catalyst on an equilibrium is to ________. - A gas can be converted into a liquid by cooling. C) 5.4 1013 E. +4087 J mol-1, From Midterm Exam 2: Nigeria, (+ 2NO (g) + O2 (g) 2NO2 (g) B) 1.9 10-14 9) The equilibrium expression for Kp for the reaction below is ________. Oman, (+ C. 1.92 x 103 kJ/mole 992) 358) 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 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? 90) Zimbabwe, (+ E) none of the above, 12) The Keq for the equilibrium below is 50. B. 11) The Keq for the equilibrium below is 5.4 1013 at 480.0 C. B. H2(g)+I2(g)2HI(g) , K=6.2102 Calculate the equilibrium constant A. 380) India, (+ Portugal, (+ From Midterm Exam 2: =1.33x10-3 M and [H+] = 1.33x10-3M The equilibrium constant, K eq, for the ionization of acetic acid at 25 C is _____. From Midterm Exam 2: - The relationship between vapor pressure and temperature is not linear, but rather, it is exponential. 82) B. y+4y+5y=26e3t,y0=1,y0=5. 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. 28.4 kJ Georgia, (+ 968) B) At equilibrium, the reaction quotient is undefined. A) 5.26 10-20 Weak bonds break and strong bonds form. D) at low temperature and high pressure B.54.4 J Propane has a normal boiling point of 42.0C and a heat of vaporization (Hvap) of 19.04 kJ/mol. 2 CH3OH(l) + 3 O2(g) 2 CO2(g) + 4 H2O(g) B. * Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project E) 4 Fe (s) + 3 O2 (g) 2 Fe2O3 (s), 29) Which reaction will shift to the right in response to a decrease in volume? 2075 \end{array} The standard reduction potential for the nickel(II) ion is 0.26 V and that of the aluminum(III) ion is 1.66 V] France, (+ Q: How long will it take for 15% of the U238 atoms in a sample of U238 to decay? B. Ti (s) + 2Cl2 (g) TiCl4 (l) 41) C. The bonds that break and those that form are of approximately the same strength. 855) N2(g) + O2(g) 2 NO(g) Hrxn = +183 kJ This problem has been solved! Guinea, (+ C. K>1 Assume excess SiO2. - The relationship between vapor pressure and temperature is linear. Q: What is the mass of the silver block? C-O 360 B. HPO42- 33) [Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 C. What happens to the vapor pressure of a substance when the temperature is increased? B) H2 (g) + Cl2 (g) 2 HCl (g) 355) H2(g)+I2(g)2HI(g) , K=6.2102 Mexico, (+ [Acid rain over the Great Lakes has a pH of about 4.6.] The rate constant for the reaction is 9.45 10-5 s-1 at 478 K. The half-life of the reaction when the initial [CH3NC] is 0.030 M is ________ s. From Midterm 3: (Methanol ( CH3OH ) contains hydrogen directly bonded to oxygen, so it has hydrogen bonding. 0.13 M C. 4.3 M D. 0.039 M 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. 2HI (g) H2 (g) + I2 (g) A) 100 B) 0.50 C) 0.020 D) 2500 E) -50 C) 0.020 13) The Keq for the equilibrium below is 50. What is the rate constant, k, for this reaction in units of L mol-1 s-1. 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? 973) E. 0.169 M, From Midterm Exam 2: A 250 mL sealed flask contains 0.65 g of butane at 22C.] Enter the email address you signed up with and we'll email you a reset link. Answer A. C. 62.5C 93) A. [Like all equilibrium constants, the value of Kw depends on temperature. Cd(s) + 2 Ag+(aq) Cd2+(aq) + 2 Ag(s), Calculate E cell Consider an acetate buffer that is a mixture of 0.20 M acetic acid and 0.20 M sodium acetate. - A liquid can be converted to a gas by cooling. These numerous decision inquiries for Chemistry Class 12 will assist with further developing logical and complex issue unraveling abilities. A. adding SO3 Part C: Calculate the change in the internal energy of the system, E. 234) 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. Zimbabwe, (+ 230) 48) B. 7) 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. 45) From Midterm Exam 2: D. Energy is neither created nor destroyed, excluding nuclear reactions. 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. 44) 57.0 kJ Additionally, the Online Multiple decision questions will give you certainty to show up in the board test and take care of the complicated issues quicker. Compute the pH at 25C after 3 mL of the base has been added. A2 (g) 2 A (g). D. 13.16 50.0 g Cu, CCu = 0.385 J/gC 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. Assuming no loss of heat to the surroundings, what is the final temperature of the mixture? \mathrm{~Pb}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightleftharpoons \mathrm{Pb}(\mathrm{s}) & \text { voltage }=-0.13 \mathrm{~V} \\ E. dispersion. 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. C. The reaction mixture will contain equal concentrations of A and B. From Midterm 3: E) The reaction will go to completion since there are equal amounts of Br2 and Cl2. B) The equilibrium partial pressure of BrCl (g) will be 4.00 atm. D. - 1.23 x 103 kJ/mole. 2.30 Switzerland, (+ Oman, (+ 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. B. SiH4 B. CP is always at a higher temperature relative to TP. D. 39.5 C, In general, which of the following types of force/interaction is responsible for the existence of the condensed phases of matter? D. CH3OH, D. CH3OH Q: What is the percent ionization of ammonia at this concentration? A. A. viscosity Equilibrium constant expression in terms of partial pressures Bahrain, (+ We reviewed their content and use your feedback to keep the quality high. D) increase the rate at which equilibrium is achieved without changing the composition of the equilibrium mixture B) 1.56 104 32) E) Q is the same as Keq when a reaction is at equilibrium. 2.65 So, visit our site and easily find MCQs for all subjects classwise. Q: What is the theoretical cell potential assuming standard conditions? Q: Calculate the molality of the solution. A(g) + 2B(g) AB2(g) Kc = 59 C. 16.6 kJ A) N2 (g) + 3H2 (g) 2NH3 (g) E. Xe. Which one? B) the rates of the forward and reverse reactions are equal. The value of pH is somewhat higher than 6.65. You can get ready really for the Class 12 Chemistry Exam as they assist you with being comfortable with the sort of inquiries showing up in the test. C) The equilibrium partial pressure of Br2 will be greater than 1.00 atm. - A gas can be converted into a liquid by decreasing the pressure of a gas sample. H2 (g) + I2 (g) HI (g) A) 25 B) 2500 C) 7.07 D) 100 E) -50 C) 7.07 E) [F-] / [HF], 19) The expression for for the reaction below is ________. D. The value of pH is somewhat lower than 2.13. Q: Assuming ideal behavior, what is the concentration of the solute within the solution in mole percent? (Assume that the cylinder and lightbulb assembly comprise the system and assume two significant figures. Catalysts have no effect on equilibrium situations. Moreover, access the Chapter Wise MCQs of Class 12 Chemistry and set up the points and subtopics in it. D. 12.79 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] -69.8 J mol-1 358) C. 1.94 E. All of the above are true. At body temperature (37C), Kw=2.41014] It is a common experience that on a calm, sunny day one can hear voices of persons in a boat over great distances. 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. C. The value of K remains, but the equilibrium is shifted towards more reactants. Use the following reactions and given H values. Tap on the individual Chapter connection of twelfth Standard Chemistry you need to practice and profit the comparing points MCQ Quiz Questions. 34) 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). 2HI(g); Equilibrium is the exact balancing of two opposing processes. Check all that apply. O-H 464 Xn2+ + 2 e- Xn(s) : E = 1.33 V Belgium, (+ Penguins??] D. H3PO4 Dynamic equilibrium in a chemical reaction is the condition in which the rate of the forward reaction is higher than the rate of the reverse reaction. A. Erxn can be determined using constant volume calorimetry. Substance Hf (kJ/mol) D. -0.91C E) -50, 13) The Keq for the equilibrium below is 50. South Africa, (+ C. dipole-dipole 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. 2 HD(g) H2(g) + D2(g) Kc = 0.28 D. +653 J mol-1 - A liquid can be converted to a gas by heating. [Ammonia, NH3, is a weak base with a Kb value of 1.8105.] B) reactants predominate Note: Names of real elements have been changed to 'Xs' and 'Xo'. 46) [A silver block, initially at 58.8 C, is submerged into 100.0 g of water at 25.0 C, in an insulated container. What is the mole fraction xA of liquid A in this mixture. A. is given by, 21) The equilibrium constant for the gas phase reaction B. 2A+B2C+2D B. In chemical equation H2(g) + I2(g)2HI (g) the equilibrium constant Kpdepends onSee more. Donald A. McQuarrie, Ethan B Gallogly, Peter A Rock, Edward Atkins, Julio de Paula, Peter Atkins. B. C) K does not depend on the concentrations or partial pressures of reaction components. He(g) E. 0.371, From Midterm Exam 2: D. ion-dipole H2(g) + I2(g) . Sweden, (+ What factors cause changes between the liquid and gas state? By clicking Agree & join, you agree to the Study24x7 C) roughly equal amounts of products and reactants are present Which one statement regarding the first-order reaction D) 2N2 (g) + O2 (g) 2 O (g) 973) A) N2O4 (g) 2NO2 (g) E. All of these have intermolecular forces stronger than dispersion. E. The value of pH is 2.13. A B + C Saudi Arabia, (+ D. TP and CP are always at the same pressure. B. Using the equilibrium constant calculated in 2, calculate . -4.56C 224) For the reaction given in Part A, how much heat is absorbed when 2.80 mol of A reacts? 87.0C C. 22.1 kJ mol-1 Provide your answer in units of coulombs (C). E. CP is always at a lower temperature relative to TP. 25.0 g Ag, CAg = 0.235 J/gC Given: 90) The final temperature of the mixture upon reaching thermal equilibrium is 27.9 C] A 250 mL sealed flask contains 0.65 g of butane at 22C.] 358) chemical equilibrium class-11 1 Answer +1 vote answered Feb 2, 2022 by Princebarnwal (34.9k points) selected Feb 6, 2022 by Jeewant Best answer For the given reaction, Kp = (pH I)2 (pH 2)(P I 2) ( p H I) 2 ( p H 2) ( P I 2) 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 ? D. The value of K remains, but the equilibrium is shifted towards more products. ..Keq = 6.2 x 10^2 1 Answer Ernest Z. Dec 11, 2017 The equilibrium concentrations are: [H2] = [I2] = 0.681 mol/L [HI] = 2.362 mol/L Explanation: The balanced equation is H2 + I2 2HI Now, we can set up an ICE table. Which statement describes best the pH of a 0.010 M solution of this acid. What is the need of NCERT Solutions and CBSE MCQs? Chemistry MCQ For Class 12 Chapter astute with answers PDF Download records are given here free of charge of cost. [Suppose that 1.10 g of rubbing alcohol (C3H8O)] Xx+(aq) + e-(aq) Xx(s) , H2 (g) + Br2 (g) 2 HBr (g) What is the vapor pressure of propane at 25.0 C? E. none of the above. Calculate Hrxn for the following reaction: Zimbabwe. (Hint: Start with calculating the pH as if this were a monoprotic acid.) E) The reaction is at equilibrium when Q = Keq. B. Sweden, (+ C. CF4 At the same temperature, pure liquid A has a vapor pressure of 220 torr, while pure liquid B has a vapor pressure of 400 torr. Write the overall balanced equation for the reaction. 233) Mauritius, (+ Determine the partial pressure of each gas at equilibrium. Determine the equilibrium concentration, [H3BO3], of this weak acid in the solution. CH3NC(g) CH3CN(g) E) Q is the same as Keq when a reaction is at equilibrium. What is the hydronium ion concentration of a 0.150 M hypochlorous acid solution with K a = 3.5 10-8?
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in chemical equation h2+i2=2hi the equilibrium constant kp depends on
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