Directions (Qs. 41 to 44): Look at the following table and answer the following: The Importance of Rocks and Minerals
| Name | Type of Rock | Use |
| Basalt | Igneous | Used in road building |
| Calcite | Mineral | Used in cements and mortars. |
| Granite | Igneous | Used for building, monuments, and tombstones. |
| Marble | Metamorphic | Used In building, floors, tile in bathrooms. |
| Obsidian | Igneous | Used in making arrowheads and knives |
| Pumice | Igneous | Used in scouring, scrubbing, and polishing materials. |
| Quartz | Mineral | Used in making glass, electrical components, and optical lenses. |
| Sandstone | Sedimentary | Used in the building industry for house. |
| Slate | Metamorphic | Used for roofs, chalkboards. |
A) B, A, D, C
B) A, B, C, D
C) D, C, B, A
D) C, D, A, B
Correct Answer: A
Solution :
Quartz is a delicate mineral used for making glasses and lenses. When dropped on the ground, it is most likely to break. Slate is used for making chalks and rooftops, Slate has comparatively more strength than quartz, but slate can also be broken easily. Pumice is used for scrubbing and polishing purposes. It is a hard substance' therefore it is number 3 in the order. Of these, granite is the hardest and is the least likely to break. It is used for making buildings, therefore, is at number 4 in the order.
You need to login to perform this action.
You will be redirected in
3 sec
