A-LevelChemistryChemical bonding9701/12 · May/June 2012 · Q31 Mark

What is the most likely shape of a molecule of hydrazine, N2H4?

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A[Diagram of N2H4 with 90° H-N-H bond angles, planar arrangement]

B[Diagram of N2H4 with 90° H-N-H bond angles, staggered arrangement]

C[Diagram of N2H4 with 120° bond angles around N, planar arrangement]

D[Diagram of N2H4 with 107° H-N-H and N-N-H bond angles, pyramidal geometry around each N]

✓ Correct answer

D: [Diagram of N2H4 with 107° H-N-H and N-N-H bond angles, pyramidal geometry around each N]

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Topic: Chemical bonding, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2012 Paper 1 Variant 2, question 3.

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