[{"id":155222,"question":"The unit of rate constant is the same as that of the rate of reaction in :","choices":[{"text":"First order reaction.","value":"A"},{"text":"Second order reaction.","value":"B"},{"text":"Zero order reaction.","value":"C"},{"text":"Third order reaction.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155219,"question":"With increases of 10°C temperature the rate of reactiondoubles. This increase in rate of reactionis due to :
","choices":[{"text":"Decrease in activation energy or reaction.","value":"A"},{"text":"Decrease in number of collisions between reactant molecules.","value":"B"},{"text":"Increase in activation energy of reactants.","value":"C"},{"text":"Increase in number of effective collisions","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":155215,"question":"The rate of reaction :","choices":[{"text":"Increase as the reaction proceeds.","value":"A"},{"text":"Decreases as the reaction proceeds.","value":"B"},{"text":"Remains the same as the reaction proceed.","value":"C"},{"text":"May decrease or increase as the reaction proceeds.","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155212,"question":"If the rate equation of a reaction 2A+B-------->Products is , Rate = K[A] [B], and A is present in large excess, then order of reaction is :","choices":[{"text":"1","value":"A"},{"text":"2","value":"B"},{"text":"3","value":"C"},{"text":"Above","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155209,"question":"In zero order reaction, the rate is independent of :","choices":[{"text":"Temperature of reaction","value":"A"},{"text":"Concentration ofreactants","value":"B"},{"text":"Concentration of products","value":"C"},{"text":"None of these.","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155207,"question":"Which technique is used to determine the absorption of radiations?
","choices":[{"text":"Dilatometer method
","value":"A"},{"text":"Optical rotation method
","value":"B"},{"text":"Spectrometry
","value":"C"},{"text":"Refractometric method
","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155203,"question":"The rate of reaction :","choices":[{"text":"Decreases as the reaction proceeds","value":"A"},{"text":"Increases as the reaction proceeds","value":"B"},{"text":"May decrease or increase reaction proceeds","value":"C"},{"text":"Remains same as the reaction proceeds","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155202,"question":"Dilatometer method is useful for the reaction that involve :","choices":[{"text":"Small volume changes in solutions","value":"A"},{"text":"Change in infractive indices","value":"B"},{"text":"Where reactants absorb U.V, visible or infrared radiation","value":"C"},{"value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155200,"question":"The rate of reaction b/w two specific time intervals is called :","choices":[{"text":"Instantaneous rate of reaction.","value":"A"},{"text":"Average rate of reaction.","value":"B"},{"text":"Rate of a reaction.","value":"C"},{"text":"Minimum rate of a reaction.","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155198,"question":"If the rate of decay of radioactive isotope decreases from 200 cpm to 25 cpm after 24 hours, what is its half life :","choices":[{"text":"8 hours","value":"A"},{"text":"6 hours","value":"B"},{"text":"4 hours","value":"C"},{"text":"3 hours","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155196,"question":"Half life period of a first order reaction is independent of:","choices":[{"text":"Presence of catalyst.","value":"A"},{"text":"Conditions of temperature","value":"B"},{"text":"Initial concentration of the compound","value":"C"},{"text":"All of above","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155193,"question":"The unit of the rate constant is the same as that of rate of reaction in :","choices":[{"text":"Third order reaction","value":"A"},{"text":"Second order reaction","value":"B"},{"text":"First order reaction","value":"C"},{"text":"Zero order reaction","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":155189,"question":"The rate equation for a reaction is Rate =k[A]. what are unit of K ?","choices":[{"text":"Mole-1 dm3 S-1
","value":"A"},{"text":"Mole dm3 S-1
","value":"B"},{"text":"Mole dm3
","value":"C"},{"text":"S-1
","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":155187,"question":"A zero order reaction is one in which :","choices":[{"text":"Rate is not affected by changing concentration of reactants.","value":"A"},{"text":"concentration of reactants do not change with the passage of time.","value":"B"},{"text":"Reactants do not react.","value":"C"},{"text":"One reactants in large excess.","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155172,"question":"A pseudo uni-molecular reaction has order of reaction :
","choices":[{"text":"3","value":"A"},{"text":"2","value":"B"},{"text":"1","value":"C"},{"text":"0","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155169,"question":"Rate law of an equation is obtained :","choices":[{"text":"From a balance equation.","value":"A"},{"text":"Can be calculated theoretically as well as determined experimentally.","value":"B"},{"text":"It is only calculated theoretically.","value":"C"},{"text":"Experimentally.","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":155165,"question":"The example of a photo chemical reaction is photosynthesis has order of reaction :","choices":[{"text":"1","value":"A"},{"text":"2","value":"B"},{"text":"0","value":"C"},{"text":"3","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155163,"question":"It rate law of an equation is written asdx/dt=K[A][B]\r\n?","choices":[{"text":"Reaction is independent of the concentration of A and B.","value":"A"},{"text":"Product is decreasing with passage of time.","value":"B"},{"text":"Reactant in increasing with passage of time.","value":"C"},{"text":"Reactant is increasing with passage of time.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155159,"question":"Hydrolysis of ethyl-acetate (ester) has order of reaction :","choices":[{"text":"3","value":"A"},{"text":"2","value":"B"},{"text":"1","value":"C"},{"text":"1","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155156,"question":"The unit rate of constan K ismole-1\r\ndm3S-1for a chemical reaction, the order of reaction is :","choices":[{"text":"3","value":"A"},{"text":"2","value":"B"},{"text":"1","value":"C"},{"text":"0","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155154,"question":"The unit of rate constant K ismole-1\r\ndm3for a chemical reaction, the order of reaction is :","choices":[{"text":"Order of reaction can determined by an experiment","value":"A"},{"text":"Order of reaction can determined from a balance equation only.","value":"B"},{"text":"Order of reaction can determined increases by increasing temperate.","value":"C"},{"text":"Order of reaction must be in whole number and not in fraction.","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155148,"question":"Which statement is true about order of reaction :","choices":[{"text":"Order of reaction can only be determined by an experiment.","value":"A"},{"text":"Order of reaction can be determined from a balance equation only.","value":"B"},{"text":"Order of reaction increase by increasing temperature.","value":"C"},{"text":"Order of reaction must be in whole number and not in fraction.","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155146,"question":"Rate of chemical reaction depends upon :","choices":[{"text":"The number of total collisions per second.","value":"A"},{"text":"Number of molecules taking part in a chemical reaction.","value":"B"},{"text":"Number of fruitful collisions per second","value":"C"},{"text":"Number of fruitless collisions per second.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155143,"question":"The change in concentration of reactant or product per unit time is called :","choices":[{"text":"Rate constant.","value":"A"},{"text":"Rate of reaction.","value":"B"},{"text":"Rate equation.","value":"C"},{"text":"Rate law.","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155141,"question":"Which of the following may affect the rate constant (k) fro a reaction :","choices":[{"text":"Change in concentration.","value":"A"},{"text":"Change in pressure.","value":"B"},{"text":"Change in pH.","value":"C"},{"text":"Change in temperature.","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":155139,"question":"It is common observation that rates of chemical reactions differ :","choices":[{"text":"Greatly.","value":"A"},{"text":"A little bit.","value":"B"},{"text":"Moderately.","value":"C"},{"value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155137,"question":"Which of the following will affect the rate :","choices":[{"text":"First step of reaction.","value":"A"},{"text":"Last step of reaction.","value":"B"},{"text":"Rate determining step.","value":"C"},{"text":"Fastest step.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155134,"question":"The rate determining step is the :","choices":[{"text":"Slowest step.","value":"A"},{"text":"Fastest step.","value":"B"},{"text":"Moderate step.","value":"C"},{"text":"Both (a) and (b).","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155132,"question":"All reactions occur in :","choices":[{"text":"A single step.","value":"A"},{"text":"A series of steps","value":"B"},{"text":"Two steps.","value":"C"},{"text":"Both (a) and (b)","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":155130,"question":"Which of the following reactions occur at moderate rate :","choices":[{"text":"Rusting of iron","value":"A"},{"text":"Chemical weathering of stone work of buildings by acidic gases in atmosphere.","value":"B"},{"text":"Hydrolysis of an ester","value":"C"},{"text":"Fermentation of sugars","value":"D"},{"value":"E"}],"correctAnswer":3}]