Waec Model Questions Vol1 2019 Biology Question 3
Practice practical question 3 from the 2019 Waec Model Questions Vol1 Biology examination. This question covers Nutrition .
A group of students carried out a qualitative and quantitative analysis of starch in three food samples (Sample X, Sample Y and Sample Z) using the iodine test. The procedure involved extracting the soluble starch from 2.00 g of each sample, reacting the extract with iodine solution, and comparing the colour intensity with a standard colour chart. The colour chart relates intensity rating (0‑5) to starch concentration in the extract as follows: 0 = 0 mg, 1 = 40 mg, 2 = 80 mg, 3 = 120 mg, 4 = 160 mg, 5 = 200 mg. The intensity ratings obtained were: Sample X – 3, Sample Y – 5, Sample Z – 2.
Question Parts
Detailed Solution & Marking Scheme
Get the step-by-step solution, key points required by examiners and detailed marking guidance through the Edcrib AI Tutor.
Reveal AnswerAbout This Question
This is Waec Model Questions Vol1 2019 Biology Question 3. It is one of the practical questions from the 2019 Waec Model Questions Vol1 Biology examination.
The question covers Nutrition .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.