Which is the best definition of activation energy?1 pointthe energy required to end a chemical reactionthe energy required to re-form the bondsthe energy required to break the the bonds of the reactant moleculethe energy required to produce the molecule2. Which statement correctly described a chemical reaction?1 pointenergy is always releasedreactants come out in the reactionproducts go to the reactionbonds between atom breaks and new bonds are form3. Which of the following is an exothermic reaction?1 pointa reaction that required an activation energya reaction that involved change in energya reaction that absorbed energy from the environmenta reaction that released an energy in the surrounding4. Photosynthesis is an example of1 pointan exothermic reaction.a reaction that emits energy.an endothermic reaction.a reaction that gives of heat.5. Which of the following is a third-order chemical reaction?1 point2 NO +Cl2 ⇢ 2 NOCl2 NO + O2 ⇢ 2 NO2O + NO + N2 ⇢ NO2 + N2all of the aboveOther:6. What catalysts are in a different phase ?1 pointhomogeneousheterogeneousbothnone of the above7. One of the assumption of the Collision theory is that the particles must have enough energy, speed, to break the bonds and form new bonds, when they collide, this is _____ .1 pointtruefalse8. In an exothermic reaction ________ .1 pointthe potential energy of the product is lower compared to potential energy of the reactant.the potential energy of the product is greater compared to potential energy of the reactant.the potential energy of the product and the reactant are the samethe potential energy of the product and the reactant sometimes high and sometimes low9. Are both Heterogenous and Homogenous used up in the chemical reaction reactions?1 pointyesnoheterogenous onlyhomogeneous only10. By application of catalyst, the activation energy for the new pathway is less than the activation energy of the normal pathway more molecules are able to take part in an effective collisions, this is ______ .1 pointtruefalse11. An entropy which shows that there is an increase in randomness and disorder.1 pointpositivenegativeneutralnone of the above12. Which of the following is an spontaneous reaction ?1 pointfireworksphotosynthesishousefireice melting at room temperature of 10 deg Celsius13. Which statement best described how catalyst can speed up a chemical reaction ?1 pointthe catalyst bind the molecule of reactant and the productthe catalyst lower the energy pathway availablethe catalyst increase the reaction of the productthe catalyst increase the concentration of the reactantsOption 514. What are the two driving force for all chemical reaction? the enthalpy and the entropy.1 pointactivation energy and potential energyactivation energy and entropyactivation energy and enthalpyentropy and enthalpy15. What type of molecularity is applied in the given chemical equation : NO + O3 ⇢ NO2 + O2 ?1 pointunimolecularbimoleculartrimulecularcan not be identified?16. How do catalysts work?1 pointmake more reactantsincrease the enthalpylower the activation energyincrease the activation energy17. The process of speeding up a reaction by using a catalyst is known as catalysis.1 pointcatalycticcatalismcatalysisnone of the above18. Which component is affected when a catalyst is added to a chemical reaction?1 pointthe amount of productthe amount of reactantthe activation energyenthalpy19. It is a chemical reactions that occurs even without being driven by outside force or heat.1 pointnonspontaneousspontaneousreversibleirreversible20. If the activation energy required for for a chemical reaction were reduced, what would happen to the rate of reaction?1 pointthe rate would increasethe rate would decreasethe rate would go up and downthe rate would remain the same

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Which is the best definition of activation energy? 1 point the energy required to end a chemical reaction the energy required to re-form the bonds the energy required to break the the bonds of the reactant molecule the energy required to produce the molecule