Answers are given in the end
1.What is complex reactions?
2.What is elementary reaction?
3. What is molecularity?
4.What is order of reaction?
5.Whats the difference between order of reaction and molecularity?
6.What is unit of rate constant for zero order reaction?
7.What is unit of rate constant for first order reaction?
8.What are psudo order reaction ?
9. What is psudo first order reaction?
10. Is Half life for zero order reaction independent of initial concentration of reactant.
11. Define Energy of activation?
12. Define threshold energy?
Answers-1. The reactions takes place in more than one step are called complex reactions.
2. The each step or reaction of complex reaction is called elementary reaction or elementary step.
3.Molecularity is the number of molecules/ species takes part in elementary reaction of complex reaction or single step reaction.
4. The sum of exponents of concentration terms of rate law is called order of reaction.
5. (1) Order order of reaction is either whole number or fractional or zero whereas molecularity is whole number and can not be zero (2) The order of reaction is obtained from rate law whereas molecularity is obtained from elementary reaction. (3) Order of reaction is for whole reaction whereas each elementary reaction has its own molecularity.
6. Mol L-1 s-1
7. s-1
8.The reaction for which molecularity is higher than order of reaction.
9. The reaction for which molecularity is 2 but order of reaction is 1. Example- Hydrolysis of ester in excess of water CH3COOC2H5 + H2O (Excess) = CH3COOH + C2H5OH
10. Yes
11. The energy required to supply to reactant to start the reaction or the energy difference between energy of transition state and energy of reactant.
12.The energy of transition state is called threshold energy.
CHEMIGOD 