[{"id":1066271,"question":"Higher pressur eincreases rate for","choices":[{"text":"Solids","value":"A"},{"text":"Gases","value":"B"},{"text":"Liquids","value":"C"},{"text":"All phases","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066270,"question":"Which increases with rise in temperature?","choices":[{"text":"Activation energy","value":"A"},{"text":"Enthalpy","value":"B"},{"text":"Collision frequency","value":"C"},{"text":"Molecular weight","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":1066269,"question":"In a chemical reaction, a catalyst.","choices":[{"text":"Alters Delta H","value":"A"},{"text":"Lowers activation energy","value":"B"},{"text":"Is consumed","value":"C"},{"text":"Forms product","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066268,"question":"Effect of temperature on rate is ","choices":[{"text":"Negligible","value":"A"},{"text":"Linear","value":"B"},{"text":"Exponential","value":"C"},{"text":"Logarithmic","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":1066267,"question":"Increase in surface area","choices":[{"text":"Increases rate","value":"A"},{"text":"Decreases rate","value":"B"},{"text":"No effect","value":"C"},{"text":"Stops reaction","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066266,"question":"Which factor affects rate of reaction.","choices":[{"text":"Concentration ","value":"A"},{"text":"Temperature","value":"B"},{"text":"Surface Area","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":1066265,"question":"A flat curve in rate vs time gaph indicate.","choices":[{"text":"Reaction completed","value":"A"},{"text":"High rate","value":"B"},{"text":"Constant rate","value":"C"},{"text":"Temperature increase","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066264,"question":"Rate of fastest","choices":[{"text":"At start","value":"A"},{"text":"In middle","value":"B"},{"text":"At end","value":"C"},{"text":"After completion","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066263,"question":"Which of the following methods measures reaction rate.","choices":[{"text":"Conductivity","value":"A"},{"text":"Titration","value":"B"},{"text":"Volume of gas","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":1066262,"question":"Unit of rate for gaseous reaction are.","choices":[{"text":"mol dm-3 s-1","value":"A"},{"text":"atm","value":"B"},{"text":"mol","value":"C"},{"text":"kg s-1","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066261,"question":"Rate of reaction is measured as.","choices":[{"text":"Increase Temperature","value":"A"},{"text":"Change is concentration per unit time","value":"B"},{"text":"Total eergy of reactants","value":"C"},{"text":"Change in volume per mole","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066260,"question":"Which one reduces activation energy.","choices":[{"text":"Catlyst","value":"A"},{"text":"Inhibitor","value":"B"},{"text":"Product","value":"C"},{"text":"Reactant","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066259,"question":"Collision frequency depends on","choices":[{"text":"Pressure","value":"A"},{"text":"Concentration","value":"B"},{"text":"Temperature","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":1066258,"question":"Effective collisions are those that.","choices":[{"text":"Have enough energy and proper orientation","value":"A"},{"text":"Are elastic","value":"B"},{"text":"Are in vacuum","value":"C"},{"text":"Produce no change","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066257,"question":"The units of the rate constant (k) for a reaction depend on the","choices":[{"text":"Activation energy of the reaction","value":"A"},{"text":"Temperature of the reaction","value":"B"},{"text":"Overall order of the reaction ","value":"C"},{"text":"Stoichiometry of the balanced chemical equation","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":1066256,"question":"On an energy profile diagram the presence of a catalyst is represented by ","choices":[{"text":"A highe rpeak representing the activation energy","value":"A"},{"text":"A lower peak representing the activation energy","value":"B"},{"text":"A change in the energy level of the reactants or products","value":"C"},{"text":"A shift in the equilibrium position","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066255,"question":"How does the presence of a catalyst affect the rate of a chemical reaction ","choices":[{"text":"It always decreases the rate of the reaction","value":"A"},{"text":"It always increases the rate of the reaction","value":"B"},{"text":"In increase the rate of the forward and decreases the rate of the reverse reaction","value":"C"},{"text":"It increases the rate of both the forward and reverse reactions","value":"D"},{"value":"E"}],"correctAnswer":4}]