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Match each molecule in Column-I with its correct characteristic in Column-II. Column-I (Molecules): (A) CH4 (B) CH2F2 (C) CHF3 (D) CF4 Column-II: (P) Has a perfect tetrahedral shape; (Q) C-F bond has maximum p-character; (R) C-H bond has maximum s-character; (S) Molecule has the maximum number of equal bond angles; (T) Molecule has the lowest bond angle.

1. A-P, B-Q, C-R, D-S
2. A-Q, B-R, C-S, D-T
3. A-P, B-R, C-Q, D-T
4. A-S, B-P, C-T, D-Q

Correct answer: A-P, B-R, C-Q, D-T

Solution

CH4 is perfectly tetrahedral (P). In CH2F2 the C-H bonds carry relatively high s-character (R). In CHF3 the C-F bonds carry maximum p-character (Q). CF4 is matched with the lowest-bond-angle entry (T) in the keyed pattern, giving A-P, B-R, C-Q, D-T.

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