Edexcel A-Level Chemistry AS 7.2 The Interactions in Molecules Such As H2o Liquid Nh3 and Liquid Hf Which Give Rise to Hydrogen Bonding Questions

Use marked Edexcel IAL Chemistry questions to draw correctly aligned hydrogen bonds, identify hydrogen-bonding molecules, and relate these attractions to phase changes and boiling behaviour.

Exam points

Draw hydrogen bonds from a lone pair to a δ+ H with the required molecular alignment.
Identify hydrogen-bonding molecules and relate the attraction to phase changes and boiling behaviour.

[Maximum number: 1]

This question is about hydrogen bonding.

Which diagram best represents a hydrogen bond between two water molecules?
□ A

Figure for Question Edexcel A-Level Chemistry AS 7.2 The Interactions in Molecules Such As H2o Liquid Nh3 and Liquid Hf Which Give Rise to Hydrogen Bonding Questions question 1 — Edexcel A-Level Chemistry AS

□ B

□ C

□ D

Figure for Answer to Question Edexcel A-Level Chemistry AS 7.2 The Interactions in Molecules Such As H2o Liquid Nh3 and Liquid Hf Which Give Rise to Hydrogen Bonding Questions question 1 — Edexcel A-Level Chemistry AS

The only correct answer is A

B is not correct because the 2 water molecules do not form a hydrogen bond between two hydrogen atoms

C is not correct because the hydrogen bond angle is not $104.5^{\circ}$

D is not correct because the angle between 2 water molecules should be $180^{\circ}$ and water molecules should not have a bond angle of $180^{\circ}$

(1)

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Edexcel A-Level Chemistry AS 7.2 The Interactions in Molecules Such As H2o Liquid Nh3 and Liquid Hf Which Give Rise to Hydrogen Bonding Questions question 1