Factors which effect reaction rates. 1) Concentration 2) Temperature 3) Presence of a Catalyst 4) Surface area 5) Orientation

You store food in a fridge to prevent spoilage. Which factor are you applying to slow the rate of reaction?

Which one of the following burns easily and why?

A. a bar of steel B. steel wool C. steel sheet D. steel pipe

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To slow the rate of spoilage of food, you are applying the factor of temperature. Lowering the temperature in the fridge slows down the biochemical reactions that lead to the spoiling of food.

Among the given options, steel wool (option B) burns easily compared to the other options. The reason for this is the surface area. Steel wool has a high surface area as it is made up of thin, fine strands of steel. The increased surface area allows for more oxygen to come in contact with the steel, facilitating the combustion process and making it burn easily.