A Catalyst is a substance which?

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Increases the equilibrium concentration of the product

Changes the equilibrium constant of the reaction

Shortens the time to reach equilibrium

Supplies energy to reaction

answer is C.

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Detailed Solution

●        Catalysis is a phenomenon that occurs when a material improves the rate of a reaction without being consumed at the end of the process.
●        Some catalysts, referred to as negative catalysts, slow down the pace of reaction. The catalyst that accelerates the rate will, of course, be a positive catalyst. However, the term "positive catalyst" is rarely used, since the word "catalyst" implies "positive catalyst."
●        Catalysts are usually foreign substances, but one of the products formed can also act as a catalyst. This type of catalyst is known as an "auto catalyst," and the phenomenon is known as auto catalysis.

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