Acid catalysed hydrolysis of ethyl acetate follows a pseudo-first order kinetics with respect to ester. If the reaction is carried out with large excess of ester, the order with respect to ester will be
1.5
0
0.5
1
The half-life for decay of 14C by β-emission is 5730 yr. The fraction of 14C decays, in a sample that is 22920 yr old, would be
A piece of wood from an archaeological sample has 5.0 counts min-1 per gram of C-14, while a fresh sample of wood has a count of 15.0 min-1g-1. If half-life of C-14 is 5770 yr, the age of the archaeological sample is
8,500 yr
9,200 yr
10,000 yr
11,000 yr
Consider the following reaction for 2NO2(g) + F2(g) → 2NO2Fg). The expression for the rate of reaction in terms of the rate of change of partial pressure of reactant and product is/are
rate =
rate =
rate =
rate =
The bacterial growth follows the rate law, = kN where k is a constant and 'N' is the dt number of bacteria cell at any time. If the population of bacteria (number of cell) is doubled in 5 min find the time in which the population will be eight times of the initial one?
following mechanism has been provided.
Thus, rate expression of the above reaction can be written as
r =k [NO2]2[F2]
r= k [NO2] [F2]
r= k [NO2]
r= k [F2]
For a reaction, an aqueous medium, the rate of reaction is given by:
The overall order of reaction is
-1
0
1
2
Reaction between compounds (A) and (B) occurs as follows
A (g) + 2B (g) → 2C (g)
Following results were obtained
(1) Exp. No. | (2) Initial concentration of [A] mol L-1 | (3) Initial concentration of [B] mol L-1 | (4) Initial rate of formation of [C] mol L-1 s-1 |
1. | 0.30 | 0.30 | 0.10 |
2. | 0.30 | 0.60 | 0.40 |
3. | 0.60 | 0.30 | 0.20 |
The correct rate- law for the said reaction is (r and k rate and rate constant respectively)
r = k[A]2B
r = k[A][B]2
r = k[A][B]
r = k[A]2[B]2
In the reaction 2NO2 N2O4; the rate of disappearance of NO2 is equal to
2 [NO2]2
2k1[NO2]2 - 2k2[N2O4]
2k2[NO2]2 - k2[N2O4]
(2k1 - k2)[NO2]
The rate constant for the raection 2N2O5 → 4NO2 + O2 is 3.0 × 10-5 s-1. If rate is 2.40 × 10-5, then concentration of N2O5 (in mol/L) is
1.4
1.2
0.04
0.8