MHT-CET Chemical Kinetics — practice questions
30 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice MHT-CET Chemical Kinetics in the app →The SI/CGS-style units of the **rate of a chemical reaction** are:For the reaction A → B, the rate of reaction can be written as:The **order of a reaction** is defined as:The **rate constant** $k$ in a rate law equals the rate of reaction when:The order of a reaction:For a zero-order reaction, the units of the rate constant $k$ are:For a first-order reaction, the units of the rate constant $k$ are:**Molecularity** of an elementary reaction refers to:The **instantaneous rate** of a reaction at time $t$ is obtained from a concentration–time graph as:For the reaction $aA + bB \to cC + dD$, the rate in terms of stoichiometric coefficients is:For the reaction $2N_2O_5(g) \to 4NO_2(g) + O_2(g)$, if $N_2O_5$ disappears at 0.02 mol dm⁻³ s⁻¹, the **rate oFor the same reaction ($2N_2O_5 \to 4NO_2 + O_2$, $d[N_2O_5]/dt = -0.02$), the **rate of formation of $NO_2$**For the reaction A + B → P, doubling [A] (at constant [B]) doubles the rate; doubling [B] (at constant [A]) quFor the reaction $2\text{NOBr}(g) \to 2\text{NO}_2(g) + \text{Br}_2(g)$, rate = $k[\text{NOBr}]^2$. If rate = If rate = $k[A][B]^2$, what are the units of $k$?For the reaction A + B → P, doubling [A] doubles the rate; tripling [A] **and** doubling [B] multiplies the raFor the reaction $2A + B \to$ products, the rate law is rate = $k[A]^2[B]$. If [A] is **tripled** and [B] is uFor the reaction $2A + B \to 2C + D$, rate = $6 \times 10^{-4}$ mol dm⁻³ s⁻¹ at $[A] = [B] = 0.3$ M. If the reFor the reaction A + B → P with rate law rate = $k[A]^2[B]$, $k = 6.25$ M⁻² s⁻¹ at 25 °C. The rate when $[A] =The rate of a reaction at 27 °C is $k$. The temperature is increased to 37 °C. Assuming the standard rule thatWhich of the following statements about **order vs molecularity** is correct?The reaction $CHCl_3(g) + Cl_2(g) \to CCl_4(g) + HCl(g)$ is first order in $CHCl_3$ and one-half order in $Cl_For the reaction A + B → P, the following initial-rate data were obtained:
| [A]/M | [B]/M | Initial rate (M/For the reaction A + B → P with $\text{rate} = k[A][B]^2$, rate = $3.6 \times 10^{-2}$ mol dm⁻³ s⁻¹ when [A] =For the reaction $2NO(g) + 2H_2(g) \to N_2(g) + 2H_2O(g)$, rate = $k[NO]^2[H_2]$. The orders w.r.t. NO, $H_2$,A first-order reaction completes 75% in 30 minutes. Its half-life (using $t_{1/2}$ being independent of concenFor the reaction $3I^-(aq) + S_2O_8^{2-}(aq) \to I_3^-(aq) + 2SO_4^{2-}(aq)$, if the rate of formation of $SO_Consider $2A + 2B \to 2C + D$. Doubling [A] at constant [B] quadruples the rate; doubling [B] at constant [A] For a zero-order reaction $A \to P$, the integrated rate law is $[A]_t = [A]_0 - kt$. If initial $[A]_0 = 1.0$For a first-order reaction, the relation between rate constant and half-life is $t_{1/2} = 0.693/k$. If $k = 2