Neco 2021 Geography Question 5
Practice objective / multiple choice question 5 from the 2021 Neco Geography examination.
A sedimentary rock sample weighs 1000 kg and has the following mineral composition by weight: quartz 40 %, feldspar 30 %, calcite 20 %, clay minerals 10 %. The silica (SiO₂) content of each mineral is: quartz 100 %, feldspar 65 %, calcite 0 %, clay minerals 45 %. Calculate the overall SiO₂ percentage of the rock.
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About This Question
This is Neco 2021 Geography Question 5. It is one of the objective questions from the 2021 Neco Geography examination.
Difficulty level: Medium .
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