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The order of a reaction depends upon
  • a)
    pressure
  • b)
    temperature
  • c)
    molecularity
  • d)
    concentration of reactants
Correct answer is option 'D'. Can you explain this answer?
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The order of a reaction depends upona) ...
If concentration of reactnt increases the order of reaction also increases so the order of reaction depends on the concentration of reactant
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The order of a reaction depends upona) ...
Explanation:

The order of a reaction refers to the relationship between the concentration of reactants and the rate of the reaction. It determines how the rate of the reaction changes with respect to changes in the concentration of the reactants.

Factors affecting the order of a reaction:

There are several factors that can affect the order of a reaction. However, the correct answer to the given question is option 'D', which states that the order of a reaction depends on the concentration of reactants. Let's understand why:

Concentration of Reactants:

The concentration of reactants plays a crucial role in determining the order of a reaction. The order of a reaction is determined experimentally by measuring the rate of the reaction at different concentrations of the reactants. This is done by monitoring the change in concentration of a reactant over time.

Experimental Determination of Order:

To determine the order of a reaction, a series of experiments are conducted where the initial concentrations of the reactants are varied while keeping all other factors constant. The rate of the reaction is then measured for each set of concentrations.

Method of Initial Rates:

One common method used to determine the order of a reaction is the method of initial rates. In this method, the initial rates of the reaction are measured for different initial concentrations of the reactants. By comparing the rates, the order of the reaction can be determined.

Rate Law Expression:

Once the order of the reaction is determined, it can be expressed using a rate law equation. The rate law equation relates the rate of the reaction to the concentrations of the reactants. For example, for a reaction with two reactants A and B, the rate law equation can be written as:

Rate = k[A]^m[B]^n

Here, 'm' and 'n' represent the orders of the reaction with respect to reactants A and B, respectively. The overall order of the reaction is the sum of the individual orders (m + n).

Conclusion:

In conclusion, the order of a reaction is determined by the concentration of reactants. By measuring the rate of the reaction at different concentrations and expressing it using a rate law equation, the order of the reaction can be determined. This information is crucial in understanding the kinetics of a reaction and can be used to predict and control the rate of chemical reactions.
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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: 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.

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.

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The order of a reaction depends upona) pressure b) temperature c) molecularity d) concentration of reactants Correct answer is option 'D'. Can you explain this answer?
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