For acid rain, the pH of rain water should be less than
5.6
Correct Answer: (c) 5.6
Explanation: Acid rain has a pH of less than 7. The pH of typical acid rain is around 5.6 due to the presence of sulfuric and nitric acids.
Which one among the following processes is NOT part of chemical weathering?
| Sedimentary Rock | Process of Formation |
| 1. Chert | Chemically formed |
| 2. Geyserite | Organically formed |
| 3. Shale | Mechanically formed |
Marble is the metamorphosed form of?
Asthenosphere is:
The discontinuity present in earth's interior between lower mantle and outer core is called _________.
Which of the following igneous rocks contain silica in excess of 65%?
Which type of rocks are found in Lafagarh and Podi Uprora ?