Only 2. Addition reactions require double bonds to be broken and are a characteristic of compounds with double bonds like alkenes. The rest of the options have no double bonds as you can see the carbons have the formula of alkalies. The only alkene is 2 the other compounds can be seen to be alkanes because they fit the general formula of alkanes. Each carbon is saturated and has four single bonds.
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The compound which can undergo an addition reaction is Unsaturated compounds.
An addition reaction is an organic reaction occur when two or more molecules combine to form a larger molecule without the loss of any atoms present in reactant.
Unsaturated compounds are organic compounds that contains double bond or triple bond and undergo addition reaction easily.
Thus, from the above conclusion we can say that The compound which can undergo an addition reaction is Unsaturated compounds.
Learn more about the Addition reaction here: https://brainly.com/question/1433809
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