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In homogeneous catalytic reactions, the rate of reaction
  • a)
    depends upon physical state of catalyst
  • b)
    depends upon the concentration of catalyst
  • c)
    is independent of the concentration of catalyst
  • d)
    is independent of the physical state of catalyst
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
In homogeneous catalytic reactions, the rate of reactiona)depends upon...
Homogeneous catalytic reactions are those in which the catalyst is in the same phase as the reactants. In such reactions, the rate of reaction depends upon the concentration of the catalyst, which is explained in the following points:

Role of Catalyst in Homogeneous Reactions
- Catalysts are used to increase the rate of reaction by providing an alternative pathway with lower activation energy.
- The catalyst participates in the reaction by forming an intermediate complex with reactants, which subsequently leads to the formation of products.
- The catalyst is regenerated at the end of the reaction, and hence, its concentration remains constant throughout the reaction.

Effect of Catalyst Concentration on Rate of Reaction
- As the concentration of the catalyst increases, the number of active sites available for the reaction also increases.
- This results in a higher rate of reaction as more reactants are able to form the intermediate complex with the catalyst.
- However, beyond a certain concentration, the rate of reaction reaches a maximum as all the active sites are occupied, and further increase in catalyst concentration does not affect the rate of reaction.

Dependence of Rate of Reaction on Catalyst Concentration
- The rate of reaction in homogeneous catalytic reactions is directly proportional to the concentration of the catalyst.
- This is because the catalyst plays an active role in facilitating the reaction by lowering the activation energy, and hence, its concentration affects the number of active sites available for the reaction.
- However, the concentration of the reactants also affects the rate of reaction, and hence, the rate law for such reactions involves both the reactant and catalyst concentrations.

Therefore, the correct answer to the given question is option 'B', i.e., the rate of reaction in homogeneous catalytic reactions depends upon the concentration of the catalyst.
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Community Answer
In homogeneous catalytic reactions, the rate of reactiona)depends upon...
The rate of reaction depends on the surface area of the catalyst. These reactions are generally slow. In homogeneous catalysis, rate majorly depends on surface area
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Read the passage given below and answer the following questions:The rate of a reaction, which may also be called its velocity or speed, can be defined with relation to the concentration of any of the reacting substances, or to that of any product of the reaction. If the species chosen is a reactant which has a concentration c at time t the rate is - dc/dt, while the rate with reference to a product having a concentration x at time t is dx/dt. Any concentration units may be used for expressing the rate; thus, if moles per liter are employed for concentration and seconds for the time, the units for the rate are moles litre–1sec–1. For gas reactions pressure units are sometimes used in place of concentrations, so that legitimate units for the rate would be (mm. Hg) sec–1 and atm. sec–1 The order of a reaction concerns the dependence of the rate upon the concentrations of reacting substances; thus, if the rate is found experimentally to be proportional to the ath power of the concentration of one of the reactants A, to the both power of the concentration of a second reactant B, and so forth, via., rate = k CAα CAβ the over-all order of the reaction is simply n = α + β + ----- (2) Such a reaction is said to be of the αth order with respect to the substance A, the βth order with respect to B.In the following questions, a statement of Assertion followed by a statement of Reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion: The unit of k is independent of order of reaction.Reason: The unit of k is moles L–1s–1.

Read the passage given below and answer the following questions:The rate of a reaction, which may also be called its velocity or speed, can be defined with relation to the concentration of any of the reacting substances, or to that of any product of the reaction. If the species chosen is a reactant which has a concentration c at time t the rate is - dc/dt, while the rate with reference to a product having a concentration x at time t is dx/dt. Any concentration units may be used for expressing the rate; thus, if moles per liter are employed for concentration and seconds for the time, the units for the rate are moles litre–1sec–1. For gas reactions pressure units are sometimes used in place of concentrations, so that legitimate units for the rate would be (mm. Hg) sec–1 and atm. sec–1 The order of a reaction concerns the dependence of the rate upon the concentrations of reacting substances; thus, if the rate is found experimentally to be proportional to the ath power of the concentration of one of the reactants A, to the both power of the concentration of a second reactant B, and so forth, via., rate = k CAα CAβ the over-all order of the reaction is simply n = α + β + ----- (2) Such a reaction is said to be of the αth order with respect to the substance A, the βth order with respect to B.In the following questions, a statement of Assertion followed by a statement of Reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion: Rate of reaction is a measure of change in concentration of reactant with respect to time.Reason: Rate of reaction is a measure of change in concentration of product with respect to time.

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In homogeneous catalytic reactions, the rate of reactiona)depends upon physical state of catalystb)depends upon the concentration of catalystc)is independent of the concentration of catalystd)is independent of the physical state of catalystCorrect answer is option 'B'. Can you explain this answer?
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