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AssignmentMultiple Choice

Rate of Chemical Reactions

Question 1 • AA-F26 Physical Science

Activation energy is required to

Answer
A
make particles move faster and increase the temperature of a substance.
B
increase the number of particle collisions to transfer more energy.
C
break chemical bonds and start a chemical reaction.

Explanation

Activation energy is the minimum energy needed to get a chemical reaction started. It helps overcome the energy barrier so existing chemical bonds can break and new bonds can form. It does not simply raise the substance’s temperature or increase the number of collisions.

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