passwella.
Menu

JAMB Biology 2007 Question 6

Question 6

Soil

A crucible of 5 gm weighed 10 gm after filling with fresh soil. It is then heated in an oven at 100°C for 1 hour. After cooling in a desiccator, the weight was 8 gm. The percentage of water in the soil is

  1. A.80%
  2. B.60%
  3. C.20%
  4. D.40%.
Show the answer and explanation

Answer: D (40%.)

Explanation

Mass of soil = 10 − 5 = 5 g. Water lost = 10 − 8 = 2 g. Percentage of water = 2/5 × 100 = 40%.