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| 21. |
What is anthracite? |
| A. |
A dark colour sandstone |
B. |
A soft limestone |
| C. |
A hard shinny black coal |
D. |
None of these |
Answer: Option C
Explanation:
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| 22. |
Which of the following layers of the earth is believed to have the heaviest mineral materials of highest density? |
| A. |
Central core |
B. |
Crust |
| C. |
Mantle |
D. |
Lithosphere |
Answer: Option A
Explanation:
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