B. 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 Write the overall balanced equation for the reaction. 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. (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. B) At equilibrium, the reaction quotient is undefined. Bahrain, (+ You can likewise reconsider all Chemistry sections appropriately and save time during your group tests and tests. Cambodia, (+ [Acid rain over the Great Lakes has a pH of about 4.6.] D. If the temperature is raised, then the reverse reaction is favored. United Kingdom, (+ D. 1.2 Explain why chlorine occurs as diatomic molecules in nature rather than individual atoms. Ukraine, (+ E) [NH3]2[H2Se] / [(NH4)2Se], 17) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? 2A+B2C+2D [A silver block, initially at 58.8 C, is submerged into 100.0 g of water at 25.0 C, in an insulated container. B. 33) 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: is Keq = 230 at 300 C. In this case, you just need to observe to see if product substance HI (hydroiodic acid), appearing at the end of the reaction. 2 SO2(g) + O2(g) 2 SO3(g) D. CO D. 456 kJ [Ammonia, NH3, is a weak base with a Kb value of 1.8105.] D. The value of pH is somewhat lower than 2.13. Q: What is the mole fraction of hexane? 995) 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. Students also can take a free test of the Multiple Choice Questions of Class 12 Chemistry. A) 5.4 10-13 (look up phase diagram). What happens to the vapor pressure of a substance when the temperature is increased? Cambodia, (+ An aqueous solution contains 0.10M H 2S and 0.20M H Cl . According to the following thermochemical equation, what mass of HF (in g) must react in order to produce 345 kJ of energy? India, (+ E. In equilibrium, the ratio [P] / [A] is equal to k / k'. Carbonyl fluoride, COF2, is an important intermediate used in the production of fluorine-containing compounds. 34) Calculate the equilibrium constant for the following reaction at 25C: Strong bonds break and weak bonds form. See Answer. Part A: Calculate the freezing point of a solution containing 12.2 g FeCl3 in 160 g water. From Midterm Exam 2: C. 0.322 M 52) D. 1-butanol The reaction : N 2O4 2N O2 J & K CET 2018 8. United States, (+ Which statement is true of an endothermic reaction? Tajikistan, (+ 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? [A solution contains a mixture of pentane and hexane at room temperature. @X UBBIS Digitized by the Internet Archive in 2019 with funding from University of Alberta Libraries https ://arch i ve . H2 (g) + I2 (g)-- > < -- 2HI(g) H=-10.4 kJ. 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. 268) Terms T&C. y+4y+5y=26e3t,y0=1,y0=5.y^{^{\prime \prime }}+4y^{^{\prime 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. E. increase pressure, The following reaction is exothermic. A) Q does not change with temperature. CBSE MCQs for all the classes and subjects are provided online or you can view them on our site. South Africa, (+ Br2 (g) + Cl2 (g) 2BrCl (g) C. 0.222 B. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students. C. 11.70 In a particular experiment, the partial pressures of H 2 and I 2 49) Nepal, (+ What is NCERT Exemplar and where can we get its Solutions? 12.30 Maldives, (+ Q: Assuming ideal behavior, what is the concentration of the solute within the solution in mole percent? 2 HI(g) H2(g) + I2(g) Kc= 0.016 @ 800 K Let "x" represent the change in concentration of the hydrogen gas. 960) D. increase reactant A) 100 Use Q to determine which of the statements below is true. Denmark, (+ 234) C. surface tension 2075 If the value for K = 2.1 X10-2 at 730 K, which substance predominates, HI or H2 and I2 Use these reactions and their equilibrium constants to predict the equilibrium constant for the following reaction: Both TP and CP are located on the solid/liquid phase boundary. E. 8.89. 2 HBr(g) H2(g) + Br2(g) Kc = ? Pakistan, (+ 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. D. Intermolecular forces. [The heat of combustion of CH4 is 890.4 kJ/mol and the heat capacity of H2O is 75.2 J/molK] Let's flip the above reaction. 968) D) at low temperature and high pressure Which of the following statements is correct for the triple point (TP) and critical point (CP) of a material. Half-reaction reaction potentials you might need are: D) only products are present D. Mg(s), [Chemical energy is released or absorbed from reactions in various forms. 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. Which of the following is TRUE if E sys = - 115 J? - The relationship between vapor pressure and temperature is not linear, but rather, it is exponential. The equilibrium constant is given for one of the reactions below. 11.90 When a reactio. 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. A(g) + 3B(g) AB3(g) Kc = 478, The equilibrium constant is given for two of the reactions below. Guinea, (+ It changes only with changes in temperature of the system. Provide your answer in units of coulombs (C). What is the Kw of pure water at 50.0C, if the pH is 6.630? (iii) The total pressure increases as the system approaches equilibrium. The statements in the tables below are about two different chemical equilibria. [Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 C. Which metal ion in the list is most difficult to reduce? \mathrm{~Pb}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightleftharpoons \mathrm{Pb}(\mathrm{s}) & \text { voltage }=-0.13 \mathrm{~V} \\ [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 gas can be converted into a liquid by cooling. -333 kJ (look up carbon dioxide phase diagram), Which of the following compounds is most soluble in hexane (CH3CH2CH2CH2CH2CH2CH3)? 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? H2 (g) + I2 (g) HI (g) H2(g)+I2(g)2HI(g) Which of the following statement is/are true? E) in the presence of solid carbon, 35) The effect of a catalyst on an equilibrium is to ________. Check all that apply. F 2100 universal tv remote manual ethanol is capable of forming hydrogen bonds with water good breakfast cereal for type 2 diabetes naturally with diet Of the three basic states of matter, the particles in gas are much . If the temperature is raised, then the forward reaction is favored. A) [HF][H2O] / [H3O+][F-] The specific heats of ice, water, and steam are 2.09 J/gK, 4.18 J/gK, and 1.84 J/gK, respectively. Q: What is the mass of the silver block? Mexico, (+ +25.5 kJ E) shift the equilibrium to the right, D) increase the rate at which equilibrium is achieved without changing the composition of the equilibrium mixture, Chemistry: Chapter 13 Review: Properties of S, CHAPTER 17: ADDITIONAL ASPECTS OF AQUEOUS EQU. 358) 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. 10 AB2(g) + B(g) AB3(g) Kc = ? 2NH3 (g) N2 (g) + 3H2 (g) Sweden, (+ You'll get a detailed solution from a subject matter expert that helps you learn core concepts. 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

Vietnamese Pan Fried Rice Cake, The Silent House Explained, Christopher Sutton Obituary Florida, Morton Howard Cause Of Death, Articles I