Which of the following increases the rate of a chemical reaction?

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A positive catalyst increases reaction rate by lowering activation energy. Decreasing temperature generally slows reactions. Decreasing concentration reduces collision frequency, lowering rate. Larger pieces have less surface area, slower reaction. Other rate-increasing factors: increasing temperature, increasing pressure (for gases), using finely powdered solids, and light for photochemical reactions.

Which of the following increases the rate of a chemical reaction? MCQ with Answer and Explanation

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