The reaction which is wrongly represented among the following is (a) \(\mathrm{CH}_{3}-\mathrm{CH}_{2} \mathrm{Cl}+\mathrm{NaI} \underset{\Delta}{\stackrel{\text { acetone }}{\longrightarrow} \mathrm{CH}_{3}-\mathrm{CH}_{2} \mathrm{I}+\mathrm{NaCl}}\) (b) \(\mathrm{CH}_{3} \mathrm{COOAg}+\mathrm{Br}_{2} \stackrel{\mathrm{CCl}_{4} / \mathrm{reflux}}{\longrightarrow} \mathrm{CH}_{3} \mathrm{Br}+\mathrm{AgBr}+\mathrm{CO}_{2}\) (c) \(\mathrm{CH}_{3} \mathrm{COOAg}+\mathrm{I}_{2} \stackrel{\mathrm{CCl}_{4} / \text { reflux }}{\longrightarrow} \mathrm{CH}_{3} \mathrm{I}+\mathrm{AgI}+\mathrm{CO}_{2}\) (d) \(\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2}+\mathrm{Cl}_{2} \stackrel{775 \mathrm{~K}}{\longrightarrow} \mathrm{ClCH}_{2}-\mathrm{CH}=\mathrm{CH}_{2}+\mathrm{HCl}\)

Write the given reactions clearly and concisely: a) \(\mathrm{CH}_{3}-\mathrm{CH}_{2} \mathrm{Cl}+\mathrm{NaI} \underset{\Delta}{\stackrel{\text { acetone }}{\longrightarrow} \mathrm{CH}_{3}-\mathrm{CH}_{2} \mathrm{I}+\mathrm{NaCl}\) b) \(\mathrm{CH}_{3} \mathrm{COOAg}+\mathrm{Br}_{2} \stackrel{\mathrm{CCl}_{4} / \mathrm{reflux}}{\longrightarrow} \mathrm{CH}_{3} \mathrm{Br}+\mathrm{AgBr}+\mathrm{CO}_{2}\) c) \(\mathrm{CH}_{3} \mathrm{COOAg}+\mathrm{I}_{2} \stackrel{\mathrm{CCl}_{4} / \text { reflux }}{\longrightarrow} \mathrm{CH}_{3} \mathrm{I}+\mathrm{AgI}+\mathrm{CO}_{2}\) d) \(\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2}+\mathrm{Cl}_{2} \stackrel{775 \mathrm{~K}}{\longrightarrow} \mathrm{ClCH}_{2}-\mathrm{CH}=\mathrm{CH}_{2}+\mathrm{HCl}\)

a) The reaction is a nucleophilic substitution reaction (SN2), where the chloride group is replaced by an iodide group. The atoms and charges are conserved, and the reaction is feasible. This reaction seems to be correct. b) The reaction shows the decomposition of silver(I) ethanoate (CH3COOAg) in the presence of bromine. The silver is replaced by a bromine atom, forming methyl bromide (CH3Br) and silver bromide (AgBr). Carbon dioxide (CO2) is also released. This reaction is known as the Hunsdiecker reaction and seems to be correct. c) Similar to reaction b), this reaction shows the decomposition of silver(I) ethanoate in the presence of iodine, resulting in the formation of methyl iodide (CH3I) and silver iodide (AgI), along with the release of carbon dioxide (CO2). This is also a Hunsdiecker reaction and seems to be correct. d) In this reaction, propene (CH3CH=CH2) reacts with chlorine gas (Cl2) at high temperature (775 K). The expected reaction would involve the addition of Cl2 to the double bond, yielding 1,2-dichloropropane (ClCH2CH2CH3) with all of the chlorine atoms participating in the reaction. However, the reaction provided shows the formation of allyl chloride (ClCH2CH=CH2) and HCl, which is not the expected outcome. Therefore, this reaction is incorrect.

The incorrect reaction among the given reactions is: (d) \(\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2}+\mathrm{Cl}_{2} \stackrel{775 \mathrm{~K}}{\longrightarrow} \mathrm{ClCH}_{2}-\mathrm{CH}=\mathrm{CH}_{2}+\mathrm{HCl}\)