Waec Model Questions Vol1 2019 Chemistry Question 35

Practice objective / multiple choice question 35 from the 2019 Waec Model Questions Vol1 Chemistry examination.

Waec Model Questions Vol1 2019 Chemistry Objective / Multiple Choice Medium Difficulty
Question 35 WAEC_MODEL_QUESTIONS_VOL1 • 2019 • CHEMISTRY • objective

The molecule XCl₃F₂ adopts a trigonal‑bipyramidal geometry with the three Cl atoms in equatorial positions and the two F atoms in axial positions. Identify the hybridisation of the central atom X, give the X-Cl and X-F bond angles, and rank the X-F and X-Cl bond lengths from shortest to longest (covalent radii: X = 1.20 Å, Cl = 0.99 Å, F = 0.71 Å; bond length ≈ sum of radii).

Answer Options

Correct Answer A. sp³d; X-Cl = 120°, X-F = 90° (axial) and 180° (between axial); bond length order: X-F < X-Cl
B. sp³d; X-Cl = 120°, X-F = 90° (axial) and 180° (between axial); bond length order: X-Cl < X-F
C. sp³; X-Cl = 90°, X-F = 120° (axial) and 180° (between axial); bond length order: X-Cl < X-F
D. sp³d²; X-Cl = 109.5°, X-F = 90° (axial) and 180° (between axial); bond length order: X-Cl < X-F
Correct Answer
A
Correct Option:
sp³d; X-Cl = 120°, X-F = 90° (axial) and 180° (between axial); bond length order: X-F < X-Cl

About This Question

This is Waec Model Questions Vol1 2019 Chemistry Question 35. It is one of the objective questions from the 2019 Waec Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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