Home
Class 12
CHEMISTRY
Assertion : Hydrolysis of ester is an ex...

Assertion : Hydrolysis of ester is an example of auto-catalytic reaction.
Reason : A catalyst speeds up the process without participating in the mechanism.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but reason is false

D

if both assertion and reason are false

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze the assertion and the reason given: ### Assertion: Hydrolysis of ester is an example of an autocatalytic reaction. ### Reason: A catalyst speeds up the process without participating in the mechanism. ### Step-by-Step Solution: 1. **Understanding Hydrolysis of Esters**: - Hydrolysis of esters involves the reaction of an ester with water, resulting in the formation of a carboxylic acid and an alcohol. - For example, if we take an ester represented as RCOOR', the hydrolysis will yield RCOOH (carboxylic acid) and R'OH (alcohol). 2. **Identifying the Role of the Product**: - During the hydrolysis, the carboxylic acid (RCOOH) produced can act as a catalyst for the reaction. - This means that the product (acid) facilitates the reaction without being consumed in the overall process, which is a key characteristic of autocatalysis. 3. **Defining Autocatalysis**: - Autocatalysis occurs when one of the products of a reaction acts as a catalyst for that same reaction. - In the case of ester hydrolysis, the acid produced catalyzes the reaction further, thus making it an autocatalytic reaction. 4. **Evaluating the Assertion**: - Since the hydrolysis of an ester involves the acid formed acting as a catalyst for the reaction, the assertion is true. 5. **Evaluating the Reason**: - The reason states that a catalyst speeds up the process without participating in the mechanism. However, in autocatalytic reactions, the product (which acts as a catalyst) does participate in the reaction mechanism. - Therefore, while the statement about catalysts is generally true, it does not apply to autocatalytic reactions where the product participates in the reaction. 6. **Conclusion**: - The assertion is true, while the reason is false. Thus, the correct answer to the question is that the assertion is true and the reason is false. ### Final Answer: - Assertion is true, Reason is false.
To solve the question, we need to analyze the assertion and the reason given: ### Assertion: Hydrolysis of ester is an example of an autocatalytic reaction. ### Reason: A catalyst speeds up the process without participating in the mechanism. ...
Promotional Banner

Topper's Solved these Questions

  • SURFACE CHEMISTRY

    NCERT FINGERTIPS ENGLISH|Exercise Adsorption|26 Videos

  • SURFACE CHEMISTRY

    NCERT FINGERTIPS ENGLISH|Exercise Catalysis|14 Videos

  • SURFACE CHEMISTRY

    NCERT FINGERTIPS ENGLISH|Exercise NCERT EXEMPLAR PROBLEMS|25 Videos

  • SOLUTIONS

    NCERT FINGERTIPS ENGLISH|Exercise Assertion And Reason|15 Videos

  • THE D- AND F- BLOCK ELEMENTS

    NCERT FINGERTIPS ENGLISH|Exercise Assertion And Reason|15 Videos

Similar Questions

Explore conceptually related problems

Assertion : Decomposition of hydrogen peroxide is an example of disproportionation reaction. Reason : In a disproportionation reaction, an element in one oxidation state is simultaneously oxidised and reduced .

Assertion : Decomposition of potassium chlorate is an example of redox reaction . Reason : There is no change in the oxidation number of potassium in decomposition of potassium chlorate.

Assertion (A) The enthalpy of reaction remains constant in the presence of a catalyst. Reason (R) A catalyst participating in the reaction froms different activated complex and lowers down the activation energy but the difference in energy of reactant and product remains the same.

Assertion (A) : Poistive catalysts increase the rate of reaction. Reason (R ): Catalysts decrease the value of DeltaG^(ɵ) .

Assertion : Gibberellins cause fruits like apple to elongate and improve its shape. Reason : GA_(3) is used to speed up the malting process in brewing industry.

Assertion(A): Fruit formation process shows increase in the rate with passage of time. Reason(R): Hydrolysis of these ester is homogeneous autocatalytic reaction. (a)If both (A) and (R) are correct, and (R) is the correct explanation of (A) (b)If both (A) and (R) are correct, but (R) is the correct explanation of (A). (c)If (A) is correct, but (R) is incorrect. (d)If (A) is incorrect, but (R) is correct.

Assertion(A): The mass of nickle catalyst recovered after being used in the hydroenation of an oil is less than the mass of nickle added to the reaction. Reason(R): Catalyst take part in the reaction but the are recoveres in the end.

Assertion: A reaction cannot become fast by itself unless a catalyst is added. Reason: A catalyst always increases the speed of a reaction. (a)If both (A) and (R) are correct, and (R) is the correct explanation of (A) (b)If both (A) and (R) are correct, but (R) is the correct explanation of (A). (c)If (A) is correct, but (R) is incorrect. (d)If (A) is incorrect, but (R) is correct.

Assertion (A): Hydrolyiss of ethyl acetate in the presence of acid is a reaction of first order whereas in the presence of alkali, it is a reaction of second order. Reason (R ): Acid acts as catalyst only whereas alkali act as one of the reactant.

Assertion : Catalysts increase the reaction velocity. Reason : Catalysts provide large surface area for reactions to occur.