MORE THAN ONE OR ONE
1) For a first order reaction(with a single reactant) the concept of half life (t1/2 = 0.693/k)
fails when the reacting molecules are less.Based on this which of the following statements is appropriate?
(A) The Assertion is true & it's becz half life is only defined for even no. of molecules irrespective of the no of reacting molecules
(B) The Assertion is true & it's becz the rate of reacn is directly proportional to the concentration of the reactant only when the reacting molecules r very large
(C) The Assertion is false becz the concept of half life is independent of the no of reacting molecules
(D)The assertion is false becz half life for a first order reaction is constant
42)Ozone decomposes as
2O3(g) ---> 3O2(g)
Mechanism of the reaction is
Step 1: O3(g) -----> O2(g) + O(g) (fast)
Step 2: O3 (g) + O(g) -----> 2O2(g) (slow)
Which of the following is true?
(A) for step 1 molecularity is 2
(B) for step 2 molecularity is 1
(C) Step 2 is RDS
(D) Rate law is -d/dt [O3] = k [O3]2[O2]-1
1i answered the second question and yes for the first one c n d both r correct