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IMSO 2025 Science International — Theory I Question 28

IMSO Science · IMSO 2025 Science International — Theory I

Question 28

Original source text (the exact panel preserves diagram labels, tables and choices):

A flask contains air which is trapped by a drop of oil in a glass tubing. When the
flask is warmed, the oil drop rises the tubing. Which of the following statements
DOES NOT explain this observation?





A. Particles of air in the flask move further apart.
B. Particles of air in the flask gain energy and move faster.
C. Particles in the oil drop increase in volume and take up more space.
D. Particles in the oil drop are pushed away by particles in the trapped air.

Question illustration
  1. Particles of air in the flask move further apart.
  2. Particles of air in the flask gain energy and move faster.
  3. Particles in the oil drop increase in volume and take up more space.
  4. Particles in the oil drop are pushed away by particles in the trapped air.