Neco 2019 Geography Question 27

Practice objective / multiple choice question 27 from the 2019 Neco Geography examination.

Neco 2019 Geography Objective / Multiple Choice Medium Difficulty

Question 27 NECO • 2019 • GEOGRAPHY • objective

A rock specimen shows interlocking crystals, a hardness of \(6\) on the Mohs scale, and contains visible feldspar and quartz grains. It does not react with dilute \(\text{HCl}\). Identify (i) the broad rock type (igneous, sedimentary or metamorphic) and (ii) the specific rock name. The rock weathers at a rate of \(0.5\ \text{mm}\) per \(100\) years. If a slab is \(10\ \text{cm}\) thick, estimate how many years it will take for the slab to be reduced to half its original thickness.

A. Sedimentary; sandstone; 5,000 years

B. Igneous; basalt; 15,000 years

C. Metamorphic; schist; 20,000 years

Correct Answer D. Igneous; granite; 10,000 years

Correct Answer

Correct Option:

Igneous; granite; 10,000 years

This is Neco 2019 Geography Question 27. It is one of the objective questions from the 2019 Neco Geography examination.

Difficulty level: Medium .

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