CHEMICAL KINETICS ,Questions [ Class 12 ]

Very Short Answer Questions

1. Write the unit of rate constant of the first order reaction.
2. What is the unit of rate of the reaction?
3. What is the effect of increase of temperature on rate constant?
4. What is the effect of increase of activation energy on rate constant?
5. What is the effect of decrease of activation energy on rate constant?
6. Write the unit of rate constant of the zero order reaction.
7. Write the Arrenius equation for rate constant of a chemical reaction.
8. Write the expression for half- life of the first order reaction.
9. Write the expression for half-life of the zero order reaction.
10. Write the unit of rate constant for of the second order reaction.
11. What is the order of reaction whose rate constant has the same units as the rate of reaction?
12. For a reaction , the graph of the rate of reaction against molar concentration of the reactant is shown. What is the order of the reaction?
    
    
13. When is the rate of reaction equal to specific reaction rate ?
14. For a reaction, A + B → Products, the rate law is given by : r = k [A]1/2[B]2. What is the order of reaction?
15. In a reaction, 2A —-> Products, the concentration of A decreases from 0.5 mol L-1 to 0.4 molL-1 in 10 minutes. Calculate the rate during this interval?
16. For which type of reactions, order and molecularity have the same value?
17. State a condition under which a bimolecular reaction is kinetically first order reaction .
18. Write expression for rate of reaction in terms of each reactant and product for the eaction
    N₂ + 3H₂ → 2NH₃
19. Express the rate of the following reaction in terms of disappearance of hydrogen in the reaction
    N₂(g) + 3H₂(g) → 2NH₃(g)
20. Write the name of four factors affecting the rate of a reaction.
21. Define specific reaction rate or rate constant.
22. Define rate of reaction.
23. State any one condition under which a bimolecular reaction may be kinetically of first order.
24. What is the rate determining step of a reaction?
25. In the reaction aA + bB → products, if concentration of A is doubled (keeping B constant) the initial rate becomes four times and if B is doubled (keeping A constant), the rate becomes double. Wht is the rate law equation and order of reation?
26. The equation A + B → C has zero order. What is the rate equation?