NMDCAT Preparation Chemistry Chapter # 4NMDCAT Practice Test Chapter no 4Attempt your practice test and evaluate the preparation level. This Chapter includes Chemical Equilibrium & Reaction Kinetics 15 Dear Students 25 minutes are given to solve 25 MCQs.Your result will be displayed at the end of the quiz. Created by Umair Ali khan NMDCAT Chemistry Chapter 4 Practice Test 1 / 251) Rate of an exothermic reaction is increased by increasing all except a) Temperature b) Volume of the vessel c) Surface area of reactants d) Concentration of reactants 2 / 252) If the equilibrium constant KC value for a certain reaction is very small, then: a) Reactants are in large amounts b) Products are in an appreciable amount c) Reactant and products both are in appreciable amount d) In such a situation equilibrium cannot be obtained 3 / 253) For the first-order reaction, the half-life is related to the expression k t1/2 = 0.693. Half-life is the 1A. Time is taken for the conc. of the product to increase to half of its original value. a) Time taken for the conc. of the product to increase to half of its original value. b) Time taken for the concentration of the reactant to fall to half of its products value. c) Time taken for the concentration of the reactant to fall to half of its original value. d) Time taken for the concentration of reactant to fall to a quarter of its original value 4 / 254) In a reaction 2X + Y → M + NIf the concentration is of Y kept constant and that of X is tripled. The rate of reaction will a) Increase 3 times b) Increase 27 times c) Increase 2 times d) Increase 9 times 5 / 255) All are correct about zero order except a) All photochemical reactions are zero order b) Rate is independent of concentration c) Radioactive decay follows zero order d) Half-life is directly proportional to initial concentration 6 / 256) Catalyst can change a) Kc b) Yield c) AH d) Ea 7 / 257) 2X+Y ⇌ Z At equilibrium 0.20 mole of X, 0.45 mole of Y and 0.15 mole of Z are present, Calculate Kc a) 8.3 b) 5.0 c) 4.0 d) 6.0 8 / 258) Following is an exothermic reactionA+ B ⇌ C+ D. Which is the correct statement a) Rate of reaction will increase by increasing temperature b) Yield of C can be increased by increasing pressure c) . Rate of reaction will decrease by increasing the temperature d) Rate is not affected by adding a catalyst 9 / 259) The difference in energy between reactants and the transition state is called a) Enthalpy of reaction b) Activation energy c) Kinetic energy d) Internal energy 10 / 2510) If the value of the Kc is large then it shows that the products are: a) More stable b) Not stable c) More unstable d) Do not gives information 11 / 2511) 1.0g mole of ethyl alcohol and 1.0g mole of acetic acid are mixed. At equilibrium 0.666g mole of the ester is present. The value of the equilibrium constant is a) 1/2 b) 2 c) 1/4 d) 4 12 / 2512) The half-life of the reaction becomes half when initial concentrations of reactants are doubled. The order of the reaction will be a) First order b) Third order c) Second order d) Zero order 13 / 2513) The rate expression of a reaction is, Rate = k[A][B]2What happens to the rate of reaction if concentrations of A and B are doubled? a) Increased two times b) Increased four times c) Increased eight times d) Increased nine times 14 / 2514) The rate of first-order reaction depends on a) Concentration of one reactant b) . Concentration of two reactants c) Concentration of three reactants d) Independence of the initial concentration 15 / 2515) The rate of a reaction involving ions can be studied by the method a) Dilatometric b) Electrical conductivity c) Refractrometric d) Optical rotation 16 / 2516) Which of the followings is a pseudo-first-order reaction? a) Acid-catalyzed hydrolysis of an ester b) Hydrolysis of tertiary butyl bromide c) Chloroform to Carbon tetrachloride d) Both A and B 17 / 2517) A buffer is prepared by mixing the solutions of equimolar acetic acid and sodium acetate. The pH should be equal to a) pKa of acid b) Less than pKa of the acid c) Number of moles of acid d) More than pKa of the acid 18 / 2518) In N2 +3H2 ⇌ 2NH3 the yield of the product will be minimum if a) Temperature is increased and pressure remains the same b) Temperature is increased and pressure decreased c) Both temperature and pressure are increased d) Amount of catalyst is increased 19 / 2519) The solubility product of a salt AB is 0.25 mol²/dm6. What will be its solubility (mol/dm³) a) 0.5 b) 0.05 c) 0.125 d) 0.025 20 / 2520) The pKa value of CH3COOH is 4.74. The pH of an equimolar solution of acetic acid and sodium acetate is: a) 13.0 b) 7.2 c) 4.79 d) 4.74 21 / 2521) One of the following is not a physical method for determination of the rate of reaction a) Spectrometry b) Electrical Conductivity c) Refractometry d) Titrimetric 22 / 2522) Which one of the following factors does not affect the equilibrium position? a) Catalyst b) Concentration of reactants and products c) Temperature d) Pressure 23 / 2523) 2HI(g) ⇌ H2(g) + I2(g)For the above reaction if Kc is 0.25, then Kp forthis reaction will be a) 1.0 b) 0.25 c) 4 d) 0.50 24 / 2524) For the gas phase reaction2X+Y ⇋ 2Z ∆H= -ive kJ/mol. The yield of Z at equilibrium could be increased by a) . Increasing the pressure b) Increasing the temperature c) Using a catalyst d) Increasing the volume 25 / 2525) The rate of chemical reaction roughly doubles for every 10°C rise in temperature. If the temperature is raised by 20°C, the rate may increase a) 4 times b) 16 times c) 8 times d) 32 times Write your Name and see your result.My WhatsApp no is +923099164667 for your query. Your score isThe average score is 57%Share to your social media, or take a screenshot Facebook 0% Restart quiz Exit See review Send feedback GET IN TOUCHVisit YouTube ChannelSubscribePages: 1 2 3 4 5 6 7 8 9 10 11 Tags: Chemical Equilibrium, NMDCAT Chemistry Chapter 4, NMDCAT practice test chapter 4, Online NMDCAT Preparation, Reaction KineticsPost author:Umair Ali khanPost published:August 7, 2022Post category:MDCAT Preparation / Online MCQs (Quiz) Please Share This Useful Info Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Read more articles Previous PostNMDCAT Preparation Chemistry Chapter # 3 Next PostNMDCAT Preparation Chemistry Chapter # 5 You Might Also Like Online NMDCAT Practice test Chapter # 7August 27, 2022 How to prepare FSc part 1 chapter 3 Chemistry through notes and quizzesNovember 29, 2021 Concept of mole for Class 11 and 12 studentsDecember 1, 2024Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment. 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