Kerosene
2 marks · EasyExplain why kerosene is suitable as a fuel for jet aircraft.
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Also accept: has a high energy content and burns cleanly; remains liquid at jet engine operating conditions; provides enough energy to power jet engines efficiently
Common mistakes: vague answers with no scientific reason; incorrectly stating it is used in petrol engines
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Marking points
M1 · 1 mark · States one correct reason for suitability (e.g., high energy content, burns efficiently, suitable boiling point)
M2 · 1 mark · Further explanation or a second relevant point (e.g., remains liquid under flight conditions or burns without producing excessive soot)
Worked solution
Kerosene is suitable as a fuel for jet aircraft because it has a high energy content and burns efficiently. It also stays as a liquid under the temperatures and pressures found in jet engines, making it safe and practical for use at high altitudes.