Which of the following is not a process of chemical weathering?

Question

Question

This question was previously asked in

Territorial Army Official Paper II (Conducted on 25 Sep 2022)

Answer 1

The correct answer is Exfoliation.

Key Points

Chemical weathering:

Chemical weathering is the process of chemical decomposition of rocks and soil.
Chemical weathering involves the rock interacting with chemicals to alter the rock's composition.
A cluster of weathering processes namely solution, carbonation, hydration, oxidation, and reduction.
These processes act on rocks to decompose, dissolve or moderate them to a fine clastic state through chemical reactions by oxygen, surface/ soil water, and other acids.
Water and air along with heat must be present to speed up all chemical reactions.

Additional Information

Exfoliation:

Over time, sheets of rock break away from the exposed rocks along the fractures, a process known as exfoliation. Hence, option 4 is correct.
Exfoliation due to pressure release is also known as “sheeting“.
Temperature changes can also contribute to mechanical weathering in a process called thermal stress.
The surface layers of the rocks tend to expand more than the rock at depth, and this leads to the peeling off of the surface layers (exfoliation).