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In which of the following hybridisation ...

In which of the following hybridisation of underlined atom changes

A

`ul(C)H_3COOH` is decarboxylated

B

`CH_3ul(C)H_2OH` is dehydrated

C

`CH_3ul(C)H_3` is chlorinated

D

`ul(C)_(6)H_6` is nitrated

Text Solution

AI Generated Solution

The correct Answer is:
To determine in which of the following options the hybridization of the underlined atom changes, we will analyze each option step by step. ### Step 1: Analyze CH3COOH (Acetic Acid) Decarboxylation - **Reaction:** CH3COOH → CH4 + CO2 - **Hybridization of Underlined Atom:** The underlined carbon in CH3COOH (the carbon in the carboxyl group) has sp² hybridization. After decarboxylation, the carbon in CH4 has sp³ hybridization. - **Conclusion:** The hybridization changes from sp² to sp³. ### Step 2: Analyze CH3CH2OH (Ethanol) Dehydration - **Reaction:** CH3CH2OH → CH2=CH2 + H2O - **Hybridization of Underlined Atom:** The underlined carbon in CH3CH2OH (the carbon attached to the OH group) has sp³ hybridization. After dehydration, the carbon in the alkene (CH2=CH2) has sp² hybridization. - **Conclusion:** The hybridization changes from sp³ to sp². This is our answer. ### Step 3: Analyze CH3CH3 (Ethane) Chlorination - **Reaction:** CH3CH3 + Cl2 → CH3CH2Cl + HCl - **Hybridization of Underlined Atom:** The underlined carbon in CH3CH3 has sp³ hybridization, and the carbon in CH3CH2Cl also has sp³ hybridization. - **Conclusion:** There is no change in hybridization. ### Step 4: Analyze Benzene Nitration - **Reaction:** C6H6 + HNO3 → C6H5NO2 (Nitrobenzene) - **Hybridization of Underlined Atom:** All carbon atoms in benzene (C6H6) have sp² hybridization, and after nitration, the carbon atoms in nitrobenzene (C6H5NO2) also retain sp² hybridization. - **Conclusion:** There is no change in hybridization. ### Final Conclusion The only option where the hybridization of the underlined atom changes is in the dehydration of ethanol (CH3CH2OH), where it changes from sp³ to sp². ### Answer: CH3CH2OH is dehydrated. ---
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