851. Which of the following type of reaction is 3rd order reaction_________________?
A. 2N2O5 = 2N2O4 + O3
B. NO + O3 ? NO2 + O2
C. 2FeCl3 + 6KI ? 2FeI2 + 6KCl + I2
D. None of these

852. The addition of a catalyst to the reaction system__________________?
A. Increases the rate of forward reaction only
B. Increases the rate of reverse reaction
C. Increases the rate of forward but decreases the rate of backward reaction
D. Increases the rate of forward as well as backward reaction equally

853. On increasing the temperature the rate of reaction increases mainly because_________________?
A. The activation energy of the reaction increases
B. Concentration of the reacting molecules increases
C. Collision frequency increases
D. None of these

854. Sum of exponents of molar concentration is called___________________?
A. Order of reaction
B. Molecularity
C. Rate of reaction
D. Average of reaction

855. In rate expression the concentration of reactants is negative. It shows_______________?
A. Concentration of reactant does not change
B. Concentration of product increases
C. Concentration of reactant decreases
D. Concentration of reactant increases

856. When a graph is plotted between 1/T on X-axis and log k on y-axis a straight line is obtained with a negative slope which has two end in__________________?
A. I and II quadrant
B. II and III quadrant
C. III and IV quadrant
D. II and IV quadrant

857. Rate of reaction when concentration of reactants are taken as unity is called_________________?
A. Arrhenius constant
B. Molecularity
C. Specific rate constant
D. Ideal rate constant

858. Which order of reaction obeys the relation t1/2 = 1/Ka____________________?
A. First order
B. Second order
C. Third order
D. Zero order

859. Activated complex is formed due to________________?
A. Pressure
B. Effective collision
C. Ineffective collisions
D. Temperature

860. Energy required to form transition state is called _________________?
A. Ea
B. P.E
C. V
D. K.E