EASY
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IMPORTANT
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What are the characteristics of a catalyst?
(a)A catalyst remains unchanged chemically at the end of chemical reaction.
(b)A catalyst takes part in a chemical reaction.
(c)All kinds of catalysts undergo catalytic poisoning.
(d)A catalyst physically changes at the end of reaction.

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Important Questions on Surface Chemistry
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IMPORTANT
The rate of a certain biochemical reaction catalysed by an enzyme in the human body is times faster than when it carried out in the laboratory. What is the activation energy of this reaction?

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Air can oxidise sodium sulphite in aqueous solution but cannot do so in the case of sodium arsenite. If, however, air is passed through a solution containing both sodium sulphite and sodium arsenite, both can be oxidized. This is an example of

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is used to convert:

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For the reaction , the energy profile diagram is given in the figure:
What is the decrease in energy of activation in presence of catalyst?

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Which of the following statements are correct about solid catalyst?

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In a reaction, catalyst changes

HARD
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IMPORTANT
Which act(s) as a negative catalyst?

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IMPORTANT
Which of the following statements is/are true?
