Chemical Kinetics

This is a Fill in the blanks Type Question as classified in NCERT Exemplar

Ans: Correct option A

Activation Energy → The amount of energy required to overcome the obstacle and generate a product

The activation energy of a forward reaction can be seen in the [E_af = E₁ + E₂] (This is an endothermic reaction.

Therefore, [E_af > E_ab]   

The energy of the product is high, while the energy of the reactant is low.

The lower the energy, the more stable and positive the situation becomes.

Δ? = posistive

This is a Fill in the blanks Type Question as classified in NCERT Exemplar

Correct option:  C

A catalyst allows a chemical reaction to occur at a faster rate or under different conditions than it would otherwise. As a result, a catalyst affects the reaction's enthalpy change, or heat. As a result, in the presence of the reaction, the enthalpy does not vary, i.e., it remains constant, and no heat is produced or absorbed.

This is a Fill in the blanks Type Question as classified in NCERT Exemplar

Correct option: B

The Arrhenius equation can be used to calculate the activation energy of a chemical process. At two temperatures, this determines the rate constants.

2.303log = $\frac{{\mathrm{K}}_2}{{\mathrm{K}}_1}$ = $\frac{{\mathrm{E}}_{\mathrm{a}}}{\mathrm{R}}$       $\frac{{\mathrm{T}}_2-{\mathrm{T}}_1}{{\mathrm{T}}_1{\mathrm{T}}_2}$

This is a Assertion and Reason Type as classified in NCERT Exemplar

Correct option: C

The assertion is valid, but the reasoning is erroneous because Arrhenius equation rate constants are accurate for both simple and complex molecules with suitable orientation during effective collision and sufficient kinetic energy to cause chemical change.

This is a Assertion and Reason Type as classified in NCERT Exemplar

Correct option: E

The claim is erroneous, but the reason is right, because the correct assertion is that effective collision leads to the production of a product, and the reason states that the conditions of collision theory must be met for the reaction to be completed.

This is a Assertion and Reason Type as classified in NCERT Exemplar

Correct option: A

Both the assertion and the reason are valid, and the reason is a correct  of the assertion since the enthalpy of reaction is the difference between the total enthalpy of the reactants and products in the presence of a catalys

This is a Assertion and Reason Type as classified in NCERT Exemplar

Correct option: E

The order and molecularity may or may not be the same, assertion is false, but reason is right. The sum of the power of the reactants is the order of reaction, which may be easily determined. The total of the stoichiometric coefficient of the rate-determining elementary step determines molecularity

This is a Assertion and Reason Type as classified in NCERT Exemplar

Correct option: B

Both assertion and reason are valid, but reason does not explain assertion because the order of reaction can be zero or even fractional because the order of reaction is proportional to the total of the power of the reactants.