A hypothetical reaction, A2 +B2 2AB mechanism as given below;
A2 A+ A ............(Fast)
A+B2 → AB + B ............(Slow)
A+ B → AB ............(Fast)
The order of the overall reaction is:
1. 2
2. 1
3. 1.5
4. zero
For a non-stoichiometric reaction 2A + B C +D, the following kinetic data were obtained in three separate experiments, all at 298 K.
Initial Concentration (A) |
Initial Concentration (B) | Initial rate of formation of C (mol L-1 S-1) |
0.1 M | 0.1 M | |
0.1 M | 0.2 M | |
0.2 M | 0.1 M |
The rate law for the formation of C is:
1. d[C]/dt = k[ A][B]
2. d[C]/dt = k[ A]2[B]
3. d[C]/dt = k[ A][B]2
4. d[C]/dt = k[ A]
Which curve represents zero order reaction?
1.
2.
3.
4.
In a reaction, the rate expression is, rate = K[A][B]2/3[C]0 , the order of the reaction is:
1. 1
2. 2
3. 5/3
4. zero
For the elementary step, (CH3)3.CBr(aq) → (CH3)3C+ (aq) + Br- (aq), the molecularity is:
1. Zero
2. 1
3. 2
4. Cannot be ascertained
A drop of solution (volume 0.05 mL) contains 3.0 x10-6 mole of H+. If the rate constant of disappearance of H+ is 1.0x107 mol litre sec?. How long would it take for H+ in drop to disappear?
1. 6x10-8 sec
2. 6x10-7 sec
3. 6x10-9 sec
4. 6x10-10 sec
A zero order reaction is one:
1. in which reactants do not react
2. in which one of the reactants is in large excess
3. whose rate does not change with time
4. whose rate increases with time
The rate constant value for a zero-order reaction is 2 x10-2 mol L-1 sec-1. If the concentration of the reactant after 25 sec is 0.5 M, then the initial concentration of reactant is:
1. 0.5 M
2. 1.25 M
3. 12.5M
4. 1.0 M
The rate constant for a second order reaction is 8x10-5 M-1 min-1 . How long will it take a 1M solution to be reduced to 0.5M?
1. 8.665 x 103 minute
2. 8 x 10-5 minute
3. 1.25 x 104 minute
4. 4x10-5 minute
Which order of reaction obeys the relation t1/2 = 1/Ka?
1. First
2. Second
3. Third
4. Zero