Which of the following statements is incorrec | vedclass

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(B) Statement $A$ is incorrect because alkyl halides do not react with alkenes to form products in this manner; rather,they are typically formed from

Vedclass · Accepted Answer

Reaction of acetone with methyl magnesium bromide gives butan-$2$-ol.

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(B) Statement $A$ is incorrect because alkyl halides do not react with alkenes to form products in this manner; rather,they are typically formed from alkenes via hydrohalogenation.Statement $B$ is correct: $CH_3COCH_3 + CH_3MgBr$ $\rightarrow (CH_3)_3COMgBr$ $\xrightarrow{H_2O} (CH_3)_3COH$ (tert-butyl alcohol),but wait,the question asks for butan-$2$-ol. Actually,the reaction of $CH_3MgBr$ with acetaldehyde gives propan-$2$-ol,and with acetone gives tert-butyl alcohol. Thus,statement $B$ is also chemically incorrect as stated.However,in the context of standard multiple-choice questions,statement $A$ is fundamentally flawed regarding the reaction type. Let us re-evaluate: $C_2H_4Cl_2$ has two isomers: $1,1$-dichloroethane and $1,2$-dichloroethane. This is correct.Reduction of ethyl chloride $(C_2H_5Cl)$ with $Zn-Cu/C_2H_5OH$ gives ethane $(C_2H_6)$. This is correct.Therefore,statement $B$ is the intended incorrect statement as it describes the wrong product for the reaction of acetone with methyl magnesium bromide.

Which of the following statements is incorrect?

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