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Bonding and structure

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Question 6

Which statement correctly explains how molecular bonding and structure determine the ability of a gas to absorb radiation and contribute to the greenhouse effect?

A

Water vapour (H2O\text{H}_2\text{O}H2​O) absorbs infrared radiation because its vibrations cause a change in its molecular dipole moment.

B

Symmetric stretching of carbon dioxide (CO2\text{CO}_2CO2​) absorbs infrared radiation because the polar C=O\text{C}=\text{O}C=O bonds vibrate in phase.

C

Diatomic nitrogen (N2\text{N}_2N2​) absorbs infrared radiation because its triple covalent bond is highly polar.

D

Methane (CH4\text{CH}_4CH4​) absorbs ultraviolet radiation because its tetrahedral geometry allows for vibrational excitation.

Markscheme

Bonding and structure Questions

  1. A Level
  2. /Chemistry
  3. /Bonding and structure

31 exam-style questions on OCR A A Level Chemistry Bonding and structure. Each one has a worked solution and a mark scheme showing where the marks go.

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