Chemical Kinetics

Define Instantaneous Rate of a reaction mathematically for a reactant R.

Why does the rate of any reaction generally decrease during the course of the reaction?

For the reaction $2HI(g) \rightarrow H_2(g) + I_2(g)$ , express the rate of reaction in terms of the disappearance of HI.

What are the units of rate of a reaction for solutions and gases?.

How does the rate of disappearance of a reactant relate to the rate of appearance of a product in $$5 Br^{-} + BrO_3^{-} + 6 H^{+} \rightarrow 3 Br_2...

Why is the rate of reaction always positive despite the decrease in reactant concentration?.

Can average rate be used to predict the rate at a specific instant?.

How is instantaneous rate determined graphically?.

Thermodynamic feasibility of the reaction alone cannot decide the rate of the reaction. Explain with one example.

Name four key factors that influence the rate of a chemical reaction.

How does a catalyst affect the Equilibrium Constant ( $K_{eq}$ )?.

Does a catalyst alter the Gibbs Energy ( $\Delta G$ ) of a reaction?.

Generally, how does the rate constant $k$ change for a $10^\circ$ rise in temperature?.

The reaction between $H_2(g)$and$O_2(g)$ is highly feasible (thermodynamically), yet allowing them to stand at room temperature does not form w...

Oxygen is available in plenty in air yet fuels do not burn by themselves at room temperature. Explain.

Why in the redox titration of $KMnO_4$ vs oxalic acid, do we heat oxalic acid solution before starting the titration?

Can the Rate Law be predicted from the balanced chemical equation?.

Define Order of a Reaction.

What is the difference between Order and Molecularity regarding values they can take?.

What is the unit of the rate constant $k$ for a Second Order reaction?.

What is an Elementary Reaction?.

For a complex reaction, which step determines the overall rate?.

Why is molecularity greater than 3 very rare?.

Identify the order if the units of $k$ are $s^{-1}$.

Why can we not determine the order of a reaction by taking into consideration the balanced chemical equation?

Give the differential rate equation for a Zero Order reaction $R \rightarrow P$.

What is the integrated rate equation for a Zero Order reaction?.

Describe the plot of $[R]$vs$t$ for a Zero Order reaction.

What is the half-life ( $t_{1/2}$ ) formula for a Zero Order reaction?.

How does half-life depend on initial concentration for Zero Order reactions?.

Give an example of a Zero Order reaction involving a catalyst.

Why does ammonia decomposition on Pt become zero order at high pressure?.

Give the integrated rate equation for First Order reaction (Exponential form).

Give the logarithmic integrated rate equation used for calculations.

Describe the plot of $\ln[R]$vs$t$ for a First Order reaction.

Describe the plot of $\log([R]_0/[R])$vs$t$.

What is the half-life ( $t_{1/2}$ ) formula for a First Order reaction?.

Does the half-life of a First Order reaction depend on initial concentration?.

What is a Pseudo First Order reaction?.

Give an example of a Pseudo First Order reaction.

Write the Arrhenius Equation.

What does $A$ represent in the Arrhenius equation?.

What does the term $e^{-E_a/RT}$represent?.

Why does the rate of a reaction increase with rise in temperature?

Write the logarithmic form of the Arrhenius equation for plotting.

Describe the plot of $\ln k$ vs $1/T$.

Write the equation relating rate constants $k_1, k_2$ at temperatures $T_1, T_2$.

What is Activation Energy ( $E_a$ )?.

How does a catalyst increase the rate according to Arrhenius theory?.

What are the two criteria for an Effective Collision?.

Define Collision Frequency ( $Z$ ).

Write the rate equation incorporating Collision Theory factors.

What does the factor $P$ stand for in the collision theory equation?.

How is Threshold Energy related to Activation Energy?.

What happens to the Maxwell-Boltzmann distribution curve when temperature increases?.

Why is the probability of reaction with molecularity higher than three very rare?

Why can't molecularity of any reaction be equal to zero?

Why is molecularity applicable only for elementary reactions and order for both?

Why do complex molecules show significant deviation from the simple collision rate equation ( $Z_{AB}e^{-E_a/RT}$ )?.

What is the order of radioactive decay?.