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B. GIVE SHORT ANSWER QUESTION
2. (a)Define catalyst.
(b)What are positive and negative catalyst ? Give examples also.
2. (a)Define catalyst.
(b)What are positive and negative catalyst ? Give examples also.
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Solution
a- Catalyst is a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change ...
b- Positive catalyst - a positive catalyst increases the rate of reaction by lowering the energy of activation
Negative catalyst - a negative reaction retards the rate of reaction . they do not lower the energy of activation rather they are combined with reactant molecule thus decreasing the number of colliding reactant molecules .
b- Positive catalyst - a positive catalyst increases the rate of reaction by lowering the energy of activation
Negative catalyst - a negative reaction retards the rate of reaction . they do not lower the energy of activation rather they are combined with reactant molecule thus decreasing the number of colliding reactant molecules .
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