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At the end of the chemical reaction the catalyst remains
- a)Unchanged in quantity but changed in composition
- b)Unchanged in quantity and composition
- c)Unchanged in composition but changed in quantity
- d)Change in quantity and composition
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
At the end of the chemical reaction the catalyst remainsa)Unchanged i...
Key-Points
- A catalyst is a substance that can be added to a reaction to enhance the reaction rate without getting consumed in the process.
- Catalysts typically speed up a reaction by lowering the activation energy or changing the reaction mechanism.
- These catalysts can be recovered at the end of the reaction and reused as they do not get altered in any way during the reaction.
- Enzymes are proteins that act as catalysts in biochemical reactions.
- A Catalyst remains unchanged in mass and chemical compositions at the end of reactions. However, its physical state can be changed.
- So, At the end of the chemical reaction, the catalyst such as granular MnO2 may be left as a finely divided powder, but not changed in composition chemically or it's mass.
- Important Points
- A stoichiometric amount of one reactant can mean the amount that will react completely with a given amount of another reactant, leaving no excess of either one.
- Catalysts do not take part in balancing the chemical reaction hence catalysts are not required in Stoichiometric amounts.
- The most common catalysts are - Aluminosilicates, Iron, Vanadium, Nickel, Platinum + Alumina.
Additional Information
- A positive catalyst is a substance that increases the rate of reaction or the speed of the reaction without getting consumed in the process.
- Catalysts can be of 2 types:
- Homogeneous catalysts- those catalysts which are in the same phase or state (mostly liquid or gas) as the reactants.
- Heterogeneous catalysts- those catalysts which are in a different phase than the reactants.
- Catalysts that are involved in biochemical reactions are called enzymes.
Most Upvoted Answer
At the end of the chemical reaction the catalyst remainsa)Unchanged i...
Explanation:
A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process. This means that the catalyst remains unchanged in quantity and composition at the end of the chemical reaction.
Unchanged in Quantity:
The catalyst does not get used up or consumed during the reaction, which means it remains in the same quantity at the end as it was at the beginning.
Unchanged in Composition:
The catalyst may undergo temporary changes in its state or form during the reaction, but it returns to its original state once the reaction is complete. Therefore, the composition of the catalyst remains unchanged.
Conclusion:
In conclusion, the correct answer is option 'B' - Unchanged in quantity and composition. A catalyst remains the same in both quantity and composition at the end of a chemical reaction.
A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process. This means that the catalyst remains unchanged in quantity and composition at the end of the chemical reaction.
Unchanged in Quantity:
The catalyst does not get used up or consumed during the reaction, which means it remains in the same quantity at the end as it was at the beginning.
Unchanged in Composition:
The catalyst may undergo temporary changes in its state or form during the reaction, but it returns to its original state once the reaction is complete. Therefore, the composition of the catalyst remains unchanged.
Conclusion:
In conclusion, the correct answer is option 'B' - Unchanged in quantity and composition. A catalyst remains the same in both quantity and composition at the end of a chemical reaction.
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At the end of the chemical reaction the catalyst remainsa)Unchanged in quantity but changed in compositionb)Unchanged in quantity and compositionc)Unchanged in composition but changed in quantityd)Change in quantity and compositionCorrect answer is option 'B'. Can you explain this answer?
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