A-LevelBiologyBiological molecules9700/12 · May/June 2022 · Q101 Mark
A student wrote four statements about water. 1 Water has a high specific heat capacity which maintains the temperature of water within cells. 2 Mammals rely on water having a relatively low latent heat of vaporisation to keep them cool. 3 When a negatively charged ion is added to water, the δ⁻ charge on the hydrogen atom is attracted to the ion. 4 When surrounded by water, non-polar molecules tend to be pushed apart from one another. Which statements are correct?
A✓
X
✓
✓
B✓
X
✓
X
CX
✓
X
✓
DX
✓
X
X
✓ Correct answer
B: ✓ X ✓ X
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