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CHEMISTRYChemical KineticsEasy

The temperature dependence of the rate constant ($k$) of a chemical reaction is written in terms of the Arrhenius equation, $k = A e^{-E^*/RT}$. The activation energy ($E^*$) of the reaction can be calculated by plotting:

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CHEMISTRYChemical KineticsEasy

Which of the following expression is correct for the reaction given below? $2HI(g) \rightarrow H_2(g) + I_2(g)$

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CHEMISTRYChemical KineticsEasy

For a reaction $3A \rightarrow 2B$, the average rate of appearance of B is given by $\frac{\Delta [B]}{\Delta t}$. The correct relation between the average rate of appearance of B with the average rate of disappearance of A is:

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CHEMISTRYChemical KineticsEasy

When the initial concentration of the reactant is doubled, the half-life period of a zero-order reaction:

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CHEMISTRYChemical KineticsMedium

The half-life of a first-order reaction is $2000 \text{ years}$. If the concentration after $8000 \text{ years}$ is $0.02 \text{ M}$, then the initial concentration was:

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CHEMISTRYChemical KineticsMedium

Given below are two statements: Assertion (A): A reaction can have zero activation energy. Reason (R): The minimum amount of energy required by reactant molecules so that their energy becomes equal to threshold value, is called activation energy.

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CHEMISTRYChemical KineticsEasy

Which of the following statements about the order of reaction is incorrect?

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CHEMISTRYChemical KineticsMedium

In a reaction, $A + B \rightarrow \text{Product}$, the rate is doubled when the concentration of $B$ is doubled, and the rate increases by a factor of $8$ when the concentrations of both the reactants ($A$ and $B$) are doubled. The rate law for the reaction can be written as:

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CHEMISTRYChemical KineticsMedium

Effective collisions are known to possess: A: Energy greater than the threshold energy. B: Breaking of old bonds in the reactant. C: Formation of a new bond in the product. D: High activation energy. E: Proper orientation. Choose the correct answer from the options given below:

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CHEMISTRYChemical KineticsMedium

Which plot of $\ln k$ vs $1/T$ is consistent with Arrhenius equation?

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CHEMISTRYChemical KineticsEasy

For the reaction, $2A + B \rightarrow 3C + D$, which of the following is an incorrect expression for the rate of reaction?

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CHEMISTRYChemical KineticsEasy

In the reaction, $BrO_3^-(aq) + 5Br^-(aq) + 6H^+ \rightarrow 3Br_2(l) + 3H_2O(l)$. The rate of appearance of bromine ($Br_2$) is related to the rate of disappearance of bromide ions ($Br^-$) as:

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CHEMISTRYChemical KineticsMedium

In a zero-order reaction for every 10 °C rise of temperature, the rate is doubled. If the temperature is increased from 10 °C to 100 °C, the rate of the reaction will become:

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CHEMISTRYChemical KineticsEasy

For a certain reaction, the rate = $k[A]^2[B]$, when the initial concentration of A is tripled keeping the concentration of B constant, the initial rate would be:

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CHEMISTRYChemical KineticsMedium

During the kinetic study of the reaction, 2A + B → C + D, following results were obtained: | Run | [A] / mol L⁻¹ | [B] / mol L⁻¹ | Initial rate of formation of D / mol L⁻¹ min⁻¹ | | :--- | :--- | :--- | :--- | | I | 0.1 | 0.1 | 6.0 × 10⁻³ | | II | 0.3 | 0.2 | 7.2 × 10⁻² | | III | 0.3 | 0.4 | 2.88 × 10⁻¹ | | IV | 0.4 | 0.1 | 2.40 × 10⁻² | Based on the above data which one of the following is correct?

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CHEMISTRYAlcohols, Phenols and EthersMedium

The correct order of increasing C-X bond reactivity toward nucleophiles among the following is: I. [Missing] II. [Missing] III. $(\text{CH}_3)_3\text{C-X}$ IV. $(\text{CH}_3)_2\text{CH-X}$

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CHEMISTRYChemical KineticsEasy

For the chemical reaction $N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)$, the correct option is:

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CHEMISTRYAlcohols, Phenols and EthersMedium

The compound that will react most readily with gaseous bromine has the formula:

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CHEMISTRYAlcohols, Phenols and EthersMedium

The compound that will undergo $\text{S}_\text{N}1$ reaction with the fastest rate is:

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CHEMISTRYElectrochemistryMedium

The Gibb's energy for the decomposition of $Al_2O_3$ at $500^{\circ}\text{C}$ is as follows: $\frac{2}{3}Al_2O_3 \rightarrow \frac{4}{3}Al + O_2 \ ; \ \Delta_rG = + 960 \text{ kJ mol}^{-1}$ The potential difference needed for the electrolytic reduction of aluminium oxide ($Al_2O_3$) at $500^{\circ}\text{C}$ is at least:

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