JAMB Biology 2014 Objective — Question 21
Question 21 of 49 from the Joint Admissions and Matriculation Board (JAMB) Biology 2014 Objective paper, with the correct answer and a full explanation.
Advertisement
A crucible of 5gm weighed 10gm 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 8gm. The percentage of water in the soil is
- A. 0.8
- B. 0.4Correct
- C. 0.2
- D. 0.6
Explanation
Weight of fresh soil = 5g; weight of water lost = 10−8 = 2g. Percentage of water = 2/5 × 100% = 40% = 0.4.
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.