A-LevelChemistryChemical bondingOct/Nov 2021Paper 1 Q51 Mark

Atom X is the central atom in a molecule. In this molecule, atom X has four pairs of valence electrons in its outer shell. The four pairs of valence electrons include at least one bond pair and at least one lone pair. What could be a possible shape for the molecule?

Q: What is the correct answer to this A-Level Chemistry question?

The correct answer is B: non-linear.

Q: What topic does this question test?

This question tests Chemical bonding in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Alinear

Bnon-linear

Ctrigonal bipyramidal

Dtrigonal planar

✓ Correct Answer

The correct answer is B: non-linear

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

🔒

Unlock the Examiner's Analysis

Join thousands of Cambridge students already using Oracle Prep

About This A-Level Chemistry Question

Topic

This multiple-choice question tests Chemical bonding in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Chemistry Oct/Nov 2021 examination, Paper 1 Variant 2.

Practice on Oracle Prep

Oracle Prep provides AI-powered practice for all Cambridge O-Level and A-Level subjects. Our platform includes topic predictions with 87.7% accuracy, AI essay grading, and a comprehensive question bank spanning 25 years of past papers across 29 subjects.