A-LevelChemistryChemical bondingFeb/Mar 2017Paper 1 Q121 Mark

The electrical conductivities of two compounds, Y and Z, are shown in the table. conductivity of the compound in the liquid state conductivity of the mixture obtained by adding the compound to water Y: good good Z: does not conduct good What could compounds Y and Z be?

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

The correct answer is C: NaF SiCl₄.

Q: What topic does this question test?

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

AAl₂O₃ SiCl₄

BNaF Al₂O₃

CNaF SiCl₄

DSiCl₄ Al₂O₃

✓ Correct Answer

The correct answer is C: NaF SiCl₄

📋 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.

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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 Feb/Mar 2017 examination, Paper 1 Variant 2.

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