Neco 2023 Geography Question 3

Practice objective / multiple choice question 3 from the 2023 Neco Geography examination.

Neco 2023 Geography Objective / Multiple Choice Medium Difficulty
Question 3 NECO • 2023 • GEOGRAPHY • objective

A rock sample consists of 40% quartz (Mohs hardness 7), 30% feldspar (hardness 6), 20% mica (hardness 2.5) and 10% calcite (hardness 3). Compute the weighted average hardness of the rock and state whether the rock, as a whole, would be able to scratch glass (hardness 5.5). Give the average hardness to one decimal place.

Answer Options

A. Average hardness 5.2; cannot scratch glass
B. Average hardness 5.6; cannot scratch glass
C. Average hardness 5.4; can scratch glass
Correct Answer D. Average hardness 5.4; cannot scratch glass
Correct Answer
D
Correct Option:
Average hardness 5.4; cannot scratch glass

About This Question

This is Neco 2023 Geography Question 3. It is one of the objective questions from the 2023 Neco Geography examination.

Difficulty level: Medium .

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