641 Which of the following type of reaction is 3rd order reaction_________________? Chemistry Medium Full question → A 2N2O5 = 2N2O4 + O3 B NO + O3 ? NO2 + O2 C 2FeCl3 + 6KI ? 2FeI2 + 6KCl + I2 D None of these
642 Which statement is incorrect about catalyst___________________? Chemistry Medium Full question → A it is used in smaller amount B decrease activation energy C specific in action D it affects specific rate constant
643 Energy of activation for backward reaction is less than forward reaction for ___________ reactio? Chemistry Medium Full question → A Endothermic B Exothermic C Moderate D Fast
644 When the reaction completes in more than one steps rate of reaction will be determined by________________? Chemistry Medium Full question → A Fast step B Slowest step C All steps D Molecularity of the reaction
645 A substance which increases the reactivity of enzyme is called_________________? Chemistry Medium Full question → A Promoters B Inhibitors C Stimulators D Non-activators
646 An enzyme has its specificity due to________________? Chemistry Medium Full question → A Substrate B Structure C Temperature D Pressure
647 Biocatalytical proteins are_________________? Chemistry Medium Full question → A Enzymes B Substrate C Lipids D any of above
648 When catalysts and reactants are in more than one phase it is________________? Chemistry Medium Full question → A Homogeneous catalysis B Heterogeneous catalysis C Catalysis D Ea
649 Anything which increases rate of reaction without being involved in the reaction________________? Chemistry Medium Full question → A Promoter B Catalyst C Inhibitor D All of the above
650 Which of the following will have very high rate of reaction ? Chemistry Medium Full question → A Double decomposition reaction B Neutralization reaction C Ionic reactions D all of above
651 Radiations are absorbed in_______________? Chemistry Medium Full question → A Spectrophotometer method B Dilatometric method C Optical relation method D Refractometric method
652 For 3rd order reaction the hhalf life is inversely proportional to initial concentration of reactants__________________? Chemistry Medium Full question → A Single B Square C Cube D Raise to power four
653 Rate of disappearance of reactant is equal to_________________? Chemistry Medium Full question → A Rate of reaction B Rate of formation of product C Energy released during reaction D A and B
654 Unit of rate of reaction is_________________? Chemistry Medium Full question → A Moles dm-3 sec-1 B Moles dm-3 C Moles sec-1 D Mol-1 dm3 sec-1
655 Spontaneous reactions are_______________? Chemistry Medium Full question → A Moderate B Slow C Fast D not natural
656 The value of activation energy is primarily determined by_______________? Chemistry Medium Full question → A Temperature B Effective collision C Concentration of reactants D Chemical nature of reactants and products
657 The specific rate constant of a first order reaction depends on the________________? Chemistry Medium Full question → A Time B Concentration of the reactant C Temperature D Concentration of the product
658 The rate of reaction___________________? Chemistry Medium Full question → A Increases as the reaction proceeds B Decreases as the reaction proceeds C Remains the same as the reaction proceeds D May decrease or increase as the reaction proceeds
659 The sequence of zones in the rotary kiln are as____________________? Chemistry Medium Full question → A dry zone burning zone decomposition zone cooling zone B cooling zone burning zone decomposition zone dry zone C burning zone cooling zone decomposition zone D dry zone decomposition zone burning zone cooling zone
660 Which one of the following raw material is not present in the cement ? Chemistry Medium Full question → A lime stone B gypsum C KNO3 D iron oxide