Show all working explaining detailly your solution.Answer Q 124 , 125 & 126 DIRECTIONS SUMMARISEDFIRSTSTATEMENTA. TRUEB TRUEC TRUED. FALSESECONDSTATEMENTTRUESecond statement is a CORRECT explanation of the firstSecond statement is NOT a correct explanation of the firstTRUEFALSETRUEFIRST STATEMENTSECOND STATEMENTThe catalyst provides a surface for reactantsto be absorbed.117. A catalysed reaction has a lower activationenergy than an uncatalysed reaction.118. At the transition state existing bonds inreacting molecules are stretched.The kinetic energy of colliding molecules isconverted into potential energy at thetransition state.119. Titration technique cannot be used tomonitor the rate of alkaline hydrolysis of anAliquates portions of the esterlaikalinemixture can be quenched by using ice-coldester.water,120. Spectrometric methods can be used tofollow-up the rate of the reaction.Nitrogen dioxide formed is the only colouredproduct in the reactionNO(g) + 0 (g) 0,(g) + NO,(g)NO(g) + 0,(g)0,(g) + NO,(g)121. Half life of a first order reaction isindependent of its initial concentration.Concentration changes do not affect ratesof first order reactions.122. The sequence of elementary reactions ofa chemical reaction is the molecularity ofthe reaction.A bimolecular reaction is one that involvestwo reactants at the rate determining step.123. The rate constant of a reaction decreasesas the reaction proceeds.The concentration of the reactants decreasesas the reaction proceeds.Concentration of reactants are highest at thestart of the reaction.124. The initial rate of a reaction is its highestrate.125. Reacting molecules acquire moreactivation energy at higher temperatures126. The rate of the reactionIncrease in temperature increases rate ofreaction.Manometric methods can onty be used toNOBR,(g) + NO(g)can be determined from the change in2NOBr(g)follow up rate of reactions that involve achange in the number of moles of the gasesinvolved.pressure.127, A reaction wnose rate is multiplied byOrder of reaction can be obtainedth when the concentration is halved isexperimetally or graphically.a third order reaction.770

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DIRECTIONS SUMMARISED FIRST STATEMENT A. TRUE B TRUE C TRUE D. FALSE SECOND STATEMENT Second statement is a CORRECT explanation of the first Second statement is NOT a correct explanation of the firs TRUE TRUE FALSE TRUE FIRST STATEMENT SECOND STATEMENT The catalyst provides a surface for reactar to be absorbed. 117. A catalysed reaction has a lower activation energy than an uncatalysed reaction. 118. At the transition state existing bonds in reacting molecules are stretched. The kinetic energy of colliding molecules converted into potential energy at the transition state. 119. Titration technique cannot be used to monitor the rate of alkaline hydrolysis of an ester. Aliquates portions of the esterlaikaline mixture can be quenched by using ice-col water, 120. Spectrometric methods can be used to follow-up the rate of the reaction. Nitrogen dioxide formed is the only colour product in the reaction NO(g) + 0 (g) 0,(g) + NO,(g) NO(g) + O,(g) 0,(g) + NO,(g) - 121. Half life of a first order reaction is independent of its initial concentration. 122. The sequence of elementary reactions of a chemical reaction is the molecularity of the reaction. Concentration changes do not affect rates of first order reactions. A bimolecular reaction is one that involve two reactants at the rate determining step 123. The rate constant of a reaction decreases as the reaction proceeds. The concentration of the reactants decrea as the reaction proceeds. Concentration of reactants are highest at start of the reaction. 124. The initial rate of a reaction is its highest rate. 125, Reacting molecules acquire more activation energy at higher temperatures Increase in temperature increases rate o reaction. 126. The rate of the reaction Manometric methods can onty be used to follow up rate of reactions that involve a change in the number of moles of the ga involved. → 2NOBr(g) NOBr,(g) + NO(g) can be determined from the change in pressure. 127 A reaction wnose rate is multiplied by % th when the concentration is halved is Order of reaction can be obtained experimetally or graphically. a third order reaction.