Waec Model Questions Vol1 2019 Geography Question 46

Practice objective / multiple choice question 46 from the 2019 Waec Model Questions Vol1 Geography examination.

Waec Model Questions Vol1 2019 Geography Objective / Multiple Choice Medium Difficulty
Question 46 WAEC_MODEL_QUESTIONS_VOL1 • 2019 • GEOGRAPHY • objective

A plutonic rock sample has the following bulk chemical composition by weight: SiO₂ = 65 %, (Na₂O + K₂O) = 20 %, Al₂O₃ = 10 %, and the remaining oxides make up the balance. Using the IUGS classification criteria, determine the rock name and state whether it is intrusive or extrusive.

Answer Options

Correct Answer A. Granite; intrusive
B. Rhyolite; extrusive
C. Diorite; intrusive
D. Granodiorite; extrusive
Correct Answer
A
Correct Option:
Granite; intrusive

About This Question

This is Waec Model Questions Vol1 2019 Geography Question 46. It is one of the objective questions from the 2019 Waec Model Questions Vol1 Geography examination.

Difficulty level: Medium .

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