Neco Model Questions Vol1 2021 Geography Question 35
Practice objective / multiple choice question 35 from the 2021 Neco Model Questions Vol1 Geography examination.
A rock sample consists of 45 % quartz, 30 % feldspar, 15 % mica and 10 % other minerals. A rock is classified as granite if quartz > 20 %, feldspar > 25 % and mica < 20 %. Assuming quartz is 100 % SiO₂, feldspar 60 % SiO₂ and mica 45 % SiO₂, determine the rock type and calculate the overall percentage of SiO₂ in the sample.
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About This Question
This is Neco Model Questions Vol1 2021 Geography Question 35. It is one of the objective questions from the 2021 Neco Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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