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Chemical Kinetics — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryChemical Kinetics1 Mark
MCQ
What is activation energy?
  • ✓
    It is the minimum amount of energy it takes to start a chemical reaction.
  • B
    It is the intermediate compound in a chemical reaction.
  • C
    It is the energy needed for an exothermic reaction.
  • D
    It is the energy needed for an endothermic reaction.
✓

Answer

Correct option: A.
It is the minimum amount of energy it takes to start a chemical reaction.
Activation Energy$:-$ The minimum energy which must be available to a chemical system with potential reactants to result in a chemical reaction
Activation energy may also be defined as the minimum energy required to start a chemical reaction.
The activation energy of a reaction is usually denoted by Ea and given in units of kilojoules per mole $(kJ$/ mol$)$ or kilocalories per mole $($kcal/ mol$).$

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