A-LevelBiologyBiological molecules9700/12 · Oct/Nov 2019 · Q131 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 vapourisation 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?
A1: ✓, 2: x, 3: ✓, 4: ✓
B1: ✓, 2: x, 3: ✓, 4: x
C1: x, 2: ✓, 3: x, 4: ✓
D1: x, 2: ✓, 3: x, 4: x
✓ Correct answer
B: 1: ✓, 2: x, 3: ✓, 4: x
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