Exams › JEE Main › Chemistry
The reaction between X and Y is first order with respect to X and zero order with respect to Y. Experiment | [X] mol L^-1 | [Y] mol L^-1 | Initial rate mol L^-1 min^-1 I. | 0.1 | 0.1 | 2 × 10^-3 II. | L | 0.2 | 4 × 10^-3 III. | 0.4 | 0.4 | M × 10^-3 IV. | 0.1 | 0.2 | 2 × 10^-3 Examine the data of table and calculate ratio of numerical values of M and L. (Nearest Integer)
- 1
- 2
- 3
- 4
Correct answer: 1
Solution
The reaction is first order with respect to X, meaning the rate is directly proportional to [X]. In experiments I and IV, where [Y] is constant, the initial rates are the same despite the change in [X], indicating that the rate does not depend on [Y]. This leads to the conclusion that M must equal L, resulting in a ratio of 1.
Related JEE Main Chemistry questions
- If a biochemical reaction is performed in the laboratory without an enzyme and its rate is found to be 10^{-6} times, then the activation energy for the reaction in the presence of the enzyme is:
- For the reaction A \rightarrow products, the half-life is 120 min when the initial concentration of A is 8.0 \times 10^{-2} M. If the starting concentration is changed to 4.0 \times 10^{-2} M, the half-life increases to 240 min. What is the reaction order?
- For a first-order process A \rightarrow B, if the rate constant is k and the initial concentration of A is 0.5 M, what is the half-life?
- For the gas-phase reaction A(g) + B(g) \rightarrow C(g), the rate law is rate = k C_A^2 C_B^4. Which change in the initial concentrations of A and B will make the reaction rate eight times larger?
- For the elementary gas-phase reaction A(g) + 2B(g) \rightarrow C(g) + D(g), an experiment starts with initial partial pressures p_A = 0.60 atm and p_B = 0.80 atm. If the partial pressure of C becomes 0.20 atm, then the reaction rate compared with the initial rate is
- From the experimental data below for the reaction A + B \rightarrow products, identify the rate law that fits the observations. Exp. 1: [A] = 0.012, [B] = 0.035, initial rate = 0.1 Exp. 2: [A] = 0.024, [B] = 0.070, initial rate = 0.8 Exp. 3: [A] = 0.024, [B] = 0.035, initial rate = 0.1 Exp. 4: [A] = 0.012, [B] = 0.070, initial rate = 0.8
⚔️ Practice JEE Main Chemistry free + battle 1v1 →