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Which of the following gives the correct increasing order of the number of lone pairs on the central atom?
- IF₇ < IF₅ < ClF₃ < XeF₂
- IF₇ < XeF₂ < ClF₂ < IF₅
- IF₇ < ClF₃ < XeF₂ < IF₅
- IF₇ < XeF₂ < IF₅ < ClF₃
Correct answer: IF₇ < IF₅ < ClF₃ < XeF₂
Solution
Central-atom lone pairs increase as IF7 (0) < IF5 (1) < ClF3 (2) < XeF2 (3), which is option 0. The stored ordering misplaces XeF2 and IF5.
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