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The correct statement is :...

`The correct statement is :

A

in `CH_(2)F_(2)` the `F-C-F` bond angle is larger `109^(@)28'`

B

in `CH_(2)F_(2)` the `C-F` bond has more than 25% s-character

C

in `CH_(2)F_(2)` the `H-C-H` bond angle is larger `109^(@)28'`

D

in `CH_(2)F_(2)` the `C-H` bond has more than 25% s-character

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the correct statement about the CH2F2 molecule, we will analyze each statement based on the molecular structure and hybridization of carbon in CH2F2. ### Step-by-step Solution: 1. **Determine the Structure of CH2F2:** - The molecular formula CH2F2 indicates that there are two hydrogen atoms and two fluorine atoms bonded to a central carbon atom. - Carbon has 4 valence electrons, and in CH2F2, it forms four bonds (two with H and two with F). 2. **Calculate the Steric Number:** - The steric number (SN) is calculated as the number of valence electrons on the central atom plus the number of monovalent atoms bonded to it. - For carbon in CH2F2: SN = 4 (from carbon) + 2 (from two H atoms) + 2 (from two F atoms) = 4. - This indicates that carbon undergoes sp3 hybridization. 3. **Determine the Geometry:** - With an sp3 hybridization, the geometry of the molecule is tetrahedral. - The ideal bond angle in a tetrahedral geometry is 109.5 degrees. 4. **Analyze Each Statement:** - **Statement A:** "In CH2F2, the F-C-F bond angle is larger than 109 degrees 28 minutes." - This is incorrect because the presence of highly electronegative fluorine atoms causes the bond angles to shrink below 109.5 degrees. - **Statement B:** "The C-F bond has more than 25% s character." - The bond angle is less than 109.5 degrees, which implies that the s character is less than 25%. Therefore, this statement is also incorrect. - **Statement C:** "In CH2F2, the H-C-H bond angle is larger than 109 degrees 28 minutes." - This is correct because the presence of fluorine pulls electron density away, causing the H-C-H bond angle to expand slightly above 109.5 degrees. - **Statement D:** "In CH2F2, the C-H bond has more than 25% s character." - Since the bond angle is larger than 109.5 degrees, this implies that the s character is indeed more than 25%. Thus, this statement is also correct. 5. **Conclusion:** - The correct statements are C and D. However, since the question asks for the correct statement, we can conclude that Statement C is the most directly correct regarding the bond angles in CH2F2. ### Final Answer: - The correct statement is: **C. In CH2F2, the H-C-H bond angle is larger than 109 degrees 28 minutes.**
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