Neco 2022 Geography Question 49

Practice objective / multiple choice question 49 from the 2022 Neco Geography examination.

Neco 2022 Geography Objective / Multiple Choice Medium Difficulty

Question 49 NECO • 2022 • GEOGRAPHY • objective

A rock sample consists of quartz (35\%), feldspar (40\%), mica (15\%) and other minerals (10\%). Densities (g/cm\(^3\)): quartz 2.65, feldspar 2.55, mica 2.80, others 2.70. For construction aggregate a rock must contain at least 40\% quartz.\n\n(a) Using the rule of mixtures, find the overall density of the rock (to two decimal places).\n(b) Does the rock meet the quartz requirement? Answer "Yes" or "No".\n(c) If it does not, determine the minimum additional percentage of quartz (replacing the other minerals proportionally) needed to reach 40\% quartz. Give the percentage increase required (to one decimal place).

A. 2.66 g\/cm³; No; 5%

B. 2.64 g\/cm³; Yes; 5%

C. 2.64 g\/cm³; No; 3%

Correct Answer D. 2.64 g/cm³; No; 5%

Correct Answer

Correct Option:

2.64 g/cm³; No; 5%

This is Neco 2022 Geography Question 49. It is one of the objective questions from the 2022 Neco Geography examination.

Difficulty level: Medium .

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows

Chat with Support