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Given below are two statements:
Statement I: In CH2F2 molecule ∠FCF is less than 109.5°
Statement II: In CH2F2 molecule both ∠FCF and ∠HCH are equal
In the light of the above statements, choose the most appropriate answer from the options given below
  • a)
    Both Statement I and Statement II are correct
  • b)
    Both Statement I and Statement II are incorrect
  • c)
    Statement I is correct but Statement II is incorrect
  • d)
    Statement I is incorrect but Statement II is correct.
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Given below are two statements:Statement I:In CH2F2molecule∠FCF is...
In difluoromethane, the F–C–F bond angle is less than 109.5° indicating less than 25 percent 's' character, but the H–C–H bond angle is larger than 109°5' showing more 's' character to the C–H bond. 
In CH2F2, the H–C–H Bond angle is 111.9° but the F–C–F bond angle is 108.3°. From VSEPR theory, the more electronegative F atom effectively increased the separation between the bond pairs, reducing lone pair–lone pair repulsion. Repulsion from the C–H bond pairs reduces the F–C–F bond angle. From Bent's Rule, the F–C–F bond angle is smaller than symmetrical 109.5° indicating that the C–F bond involves less than 25% 's' character, whereas C–H bond uses greater 's' character as reflected in the widening of H–C–H angle.  
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Given below are two statements:Statement I:In CH2F2molecule∠FCF is...
Analysis of Statement I
- In the CH2F2 molecule, the central carbon atom is bonded to two hydrogen atoms and two fluorine atoms.
- The molecular geometry around the carbon atom is tetrahedral, which typically has bond angles of 109.5 degrees.
- However, due to the higher electronegativity of fluorine compared to hydrogen, the bond angles are affected.
- The presence of two fluorine atoms creates greater repulsion than the two hydrogen atoms, resulting in the angle ∠FCF being less than 109.5 degrees.
Conclusion for Statement I:
- Statement I is correct because ∠FCF is indeed less than 109.5 degrees.
Analysis of Statement II
- In CH2F2, the bond angle ∠HCH involves the hydrogen atoms around the carbon atom.
- The bond angle ∠HCH can be influenced by the presence of the more electronegative fluorine atoms, creating unequal repulsions.
- Therefore, it is incorrect to say that both angles (∠FCF and ∠HCH) are equal. They are not the same due to the differing influences of the bonded atoms.
Conclusion for Statement II:
- Statement II is incorrect because ∠FCF and ∠HCH are not equal.
Final Evaluation:
- Since Statement I is correct and Statement II is incorrect, the most appropriate answer is option 'C': Statement I is correct but Statement II is incorrect.
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Given below are two statements:Statement I:In CH2F2molecule∠FCF is less than 109.5°Statement II:In CH2F2molecule both ∠FCF and∠HCH are equalIn the light of the above statements, choose the most appropriate answer from the options given belowa)Both Statement I and Statement II are correctb)Both Statement I and Statement II are incorrectc)Statement I is correct but Statement II is incorrectd)Statement I is incorrect but Statement II is correct.Correct answer is option 'C'. Can you explain this answer? for UGC NET 2025 is part of UGC NET preparation. The Question and answers have been prepared according to the UGC NET exam syllabus. Information about Given below are two statements:Statement I:In CH2F2molecule∠FCF is less than 109.5°Statement II:In CH2F2molecule both ∠FCF and∠HCH are equalIn the light of the above statements, choose the most appropriate answer from the options given belowa)Both Statement I and Statement II are correctb)Both Statement I and Statement II are incorrectc)Statement I is correct but Statement II is incorrectd)Statement I is incorrect but Statement II is correct.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for UGC NET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Given below are two statements:Statement I:In CH2F2molecule∠FCF is less than 109.5°Statement II:In CH2F2molecule both ∠FCF and∠HCH are equalIn the light of the above statements, choose the most appropriate answer from the options given belowa)Both Statement I and Statement II are correctb)Both Statement I and Statement II are incorrectc)Statement I is correct but Statement II is incorrectd)Statement I is incorrect but Statement II is correct.Correct answer is option 'C'. Can you explain this answer?.
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