Post-UTME Biology 2015 Objective — Question 16
Question 16 of 20 from the Post-UTME Screening (Post-UTME) Biology 2015 Objective paper, with the correct answer and a full explanation.
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In an experiment, the following results were obtained: I. Original weight of soil = x g, II. Weight of oven dried soil = y g, III. Weight of humus in soil = z g. The percentage of water in the soil is therefore given by the expression
- A. (x-y)/z x 100
- B. (x-y)/x x 100Correct
- C. z/(x-y) x 100
- D. x/(x-y) x 100
Explanation
The water lost on oven-drying is (x-y). Expressed as a percentage of the original soil weight (x), the percentage of water = (x-y)/x x 100.
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