OCR Chemistry A - 'Alkanes' (4.1.2)

TICK ALL THAT APPLY: Which of the following is true about bonding in alkanes?

• They are bonds σ bonds

• They are bonds π bonds

• There is free rotation around the bonds

• They are polar

What is the shape around each carbon atom in an alkane?

What is the bond angle, in degrees, around each carbon atom in an alkane?

TICK ALL THAT APPLY: What forces exist between molecules of alkanes?

• London forces

• Permanent dipole-dipole forces

• Hydrogen bonds

• Covalent bonds

Which of these has the lowest boiling point?

• Pentane

• Methylbutane

• Dimethylpropane

Name this alkane. Exactly correct answers only!

What is the value of a in this equation?

C₄H₁₀ + a O₂ --> b CO₂ + c H₂O

• 6.5

• 7.5

• 8.5

• 9.5

What is the name of the mechanism for the reaction between an alkane and a halogen?

What kind of bond breaking occurs when a halogen is exposed to ultra violet light in an initiation step?

• Homolytic fission

• Heterolytic fission

Which TWO of the following represent propagation steps in the reaction between methane and chlorine?

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