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question_answer1) Define rate of a chemical reaction.
question_answer2) What is instantaneous rate of reaction?
question_answer3) What is average rate of reaction?
question_answer4) Write units of rate of reaction.
question_answer5) Define rate law.
question_answer6) What is rate constant?
question_answer7) Give the unit of rate constant of a reaction.
question_answer8) What is order of reaction?
question_answer9) Define molecularity of a reaction.
question_answer10) In what condition order and molecularity of a reaction become equal?
question_answer11) In which type of reaction order and molecularity are different?
question_answer12) What do you mean by rate determining step?
question_answer13) What is zero order reaction?
question_answer14) What is half life period of a reaction?
question_answer15) Draw a graph between concentration and time for a zero order reaction.
question_answer16) Draw a graph between and t for a first order reaction.
question_answer17) Draw a graph between and time for a first order reaction.
question_answer18) What is collision frequency?
question_answer19) Name the two barriers for a chemical reaction to occur.
question_answer20) What is effective collision?
question_answer21) What is average rate of reaction? How is it determined?
question_answer22) What is instantaneous rate of reaction? How is it determined?
question_answer23) Mention differences between order and molecularity of a reaction.
question_answer24) What is zero order reaction? Give one example of zen order reaction.
question_answer25) Write expression for rate constant of a zero order reaction and explain the terms involved. What is the unit of rate constant of a zero order reaction?
question_answer26) Define first order reaction with one suitable example.
question_answer27) Write expression for rate constant of first order reaction. Mention unit of rate constant of a first order reaction.
question_answer28) Prove that half life period of a zero order reaction is directly proportional to initial concentration of the reactant
question_answer29) Show that half life period of a first order reaction is independent of initial concentration of the reactant.
question_answer30) What is pseudo first order reaction? Give an example.
question_answer31) What is the effect of temperature on the reaction rate?
question_answer32) Write Arrhenius equation and explain the terms involved.
question_answer33) What is activation energy? How is it calculated?
question_answer34) Draw a graph between and of a reaction.
question_answer35) What is catalyst? What is the effect of catalyst on the rate of a reaction?
question_answer36) What is intermediate complex theory of catalysis?
question_answer37) How does a catalyst increase the rate of a reaction?
question_answer38) What is the drawback of collision theory?
question_answer39) Mention the necessary condition for collision of reaction molecules to give product.
question_answer40) Reaction having molecularity greater than three is not observed. Explain.
question_answer41) Why rate of reaction increases with rise in temperature?
question_answer42) Catalyst does not affect the equilibrium rather helps in quick attainment of equilibrium. Explain this statement.
question_answer43) What are the limitations of a catalyst?
question_answer44) What is reaction rate?
question_answer45) Identify the reaction order from each of the following rate. (i) \[k=2.3\times {{10}^{5}}\,J\,mo{{l}^{-1}}\,{{s}^{-1}}\] (ii) \[k=3.1\times {{10}^{-4}}{{s}^{-1}}\]
question_answer46) Name the photosensitizer in the photosynthesis of plants.
question_answer47) For a reaction \[A+{{H}_{2}}O\xrightarrow{\,}B;\,\,\text{Rate}\,\,\text{k}\propto \,\,\text{ }\!\![\!\!\text{ A }\!\!]\!\!\text{ }\]. What is its (i) Molecularity (ii) Order?
question_answer48) Average rate of reaction does not give the true picture of the reaction rate. Explain.
question_answer49) Powdered sugar dissolves in water faster than crystalline sugar. Why?
question_answer50) Why does it take more time to boil an egg or cook rice at higher altitudes?
question_answer51) Why is time saved when cooking is done in a pressure cooker?
question_answer52) There is no difference in the cooking time between sea level and higher altitude when a pressure cooker is used at both the places. Discuss.
question_answer53) Slow reactions require less activation energy as compared to fast reactions. Do you agree with the statement?
question_answer54) A lump of coal burns at moderate rate in air while coal dust burns explosively. Explain.
question_answer55) Why does liquid bromine react slowly as compared to vapours of bromine?
question_answer56) Identify, giving reasons, the faster reaction in each of the following: (i) \[2Na(s)+{{I}_{2}}(s)\xrightarrow{\,}\,2NaI(s)\] \[2Na(s)+{{I}_{2}}(g)\xrightarrow{\,}\,2NaI(s)\] (ii) \[C(s)+2{{H}_{2}}O(g)\xrightarrow{\,}\,2{{H}_{2}}(g)+C{{O}_{2}}(g)\] \[C(s)+2{{H}_{2}}O(s)\xrightarrow{Catalyst}\,2{{H}_{2}}(g)+C{{O}_{2}}(g)\] (iii) \[C(s)+1/2\,{{O}_{2}}(g)\xrightarrow{{{5}^{o}}0}\,CO(g)\] \[C(s)+1/2\,{{O}_{2}}(g)\xrightarrow{{{1}^{o}}0}\,CO(g)\] (iv)\[{{N}_{2}}\,(10\,\text{atm})+3{{H}_{2}}\,(10\,\,atm)\xrightarrow{\,}2N{{H}_{3}}(g)\] \[{{N}_{2}}(5\,atm)\,+3{{H}_{2}}\,(5\,atm)\,\xrightarrow{\,}\,2N{{H}_{3}}(g)\]
question_answer57) A reaction proceeds with a uniform rate throughout. What do you conclude?
question_answer58) What is the order of reaction whose rate constant has the same units as the rate of reaction?
question_answer59) Why does not coal burn by of its own but once initiated by flame, it continues to burn?
question_answer60) Why are reactions of high molecularity less in number?
question_answer61) In a first order reaction, the units of the rate constant do not depend upon the concentration of the reactants. Justify.
question_answer62) State one condition under which a bimolecular reaction may be kinetically of first order reaction.
question_answer63) Why does not equilibrium constant change on adding a catalyst in a reaction?
question_answer64) The possible mechanism for the reaction \[2NO(g)+{{O}_{2}}(g)\xrightarrow{\,}\,2N{{O}_{2}}(g)\]is (i) \[NO+{{O}_{2}}N{{O}_{3}}\,(\text{Fast})\] (ii) \[N{{O}_{3}}+NO\,N{{O}_{2}}+N{{O}_{2}}\,(\text{Slow})\] What is the predicted rate law and order of the reaction?
question_answer65) If half-life of a reaction is inversely proportional to initial concentration of the reactant, what is the order of reaction?
question_answer66) \[{{E}_{1}}\]and\[{{E}_{2}}\] are the activation energies of the reactant and product respectively. If \[{{E}_{2}}>{{E}_{1}},\] predict the nature of the reaction.
question_answer67) Following reaction takes place in one step: \[2NO(g)+{{O}_{2}}(g)\xrightarrow{\,}\,2\,N{{O}_{2}}(g)\] How will the rate of above reaction change if the volume of the reaction vessel is diminished to one third of its original volume? Will there be any change in the order of reaction with the reduced volume?
question_answer68) In some reactions, it is found that a large number of colliding molecules have energy more than the threshold value, yet they are quite slow. Explain.
question_answer69) Is it possible for a chemical reaction to have zero activation energy?
question_answer70)
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