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GANAPATHI

· started a discussion

· 1 Months ago

catalyst (Question: 496508.0 )

answer is d it only alter the rate of reaction

Question:

Catalyst is a substance which

Options:
A)

increases the rate of the reaction

B)

decreases the rate of reaction

C)

has no action on the rate of the reaction

D)

None of these

Solution:

Ans: (a)

Catalysis is the change in rate of a chemical reaction due to the participation of a substance called a catalyst. Unlike other reagents that participate in the chemical reaction, a catalyst is not consumed by the reaction itself. A catalyst may participate in multiple chemical transformations. Catalysts that speed the reaction are called positive catalysts. Substances that slow a catalyst’s effect in a chemical reaction are called inhibitors. Substances that increase the activity of catalysts are called promoters, and substances that deactivate catalysts are called catalytic poisons.

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