Waec Model Questions Vol1 2017 Geography Question 10
Practice objective / multiple choice question 10 from the 2017 Waec Model Questions Vol1 Geography examination.
A granite outcrop of mass 5 000 kg has the following mineral composition by weight: quartz 30 %, feldspar 25 %, mica 20 %, amphibole 15 %, biotite 10 %. During chemical weathering, feldspar and mica each lose 40 % of their mass, which is leached away, and the remaining 60 % is transformed into clay minerals. Quartz remains unchanged. Amphibole loses 20 % of its mass, which is leached away, and the remaining 80 % becomes iron oxides. Biotite remains unchanged. Calculate (i) the mass of clay minerals produced and (ii) the final mass of the soil layer (in kg, to one decimal place).
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About This Question
This is Waec Model Questions Vol1 2017 Geography Question 10. It is one of the objective questions from the 2017 Waec Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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