DMPQ-Discuss different types of physical or Chemical weathering.

Chemical weathering can be due to solution, carbonation, hydration or oxidation/reduction.


When something is dissolved in water or acids, the water or acid with dissolved content is called a solution. This process involves the removal of solids in solution and depends upon the solubility of a mineral in water or weak acids. When coming into contact with water, many solids disintegrate and mix up as a suspension in water. Soluble rock-forming minerals like nitrates, sulphates, potassium etc are affected by this process.


Carbonation is the reaction of carbonate and bicarbonate with minerals and is a common process helping to break down feldspar and carbonate minerals. Carbon dioxide from the atmosphere and soil air is absorbed by water to form carbonic acid that acts as a weak acid.


Hydration is the chemical addition of water. Minerals take up water and expand; this expansion causes an increase in the volume of the material itself or rock. The process is reversible and long, continued repetition of this process causes fatigue in the rocks and may lead to their disintegration.

Oxidation and reduction

In weathering, oxidation means a combination of a mineral with oxygen to form oxides or hydroxides. Minerals most commonly involved in this are iron, manganese, sulphur etc. The red colour of the iron upon oxidation turns to brown and yellow. In this process of oxidation, rock breakdown occurs due to the disturbance caused by the addition of oxygen.

JPSC Notes brings Prelims and Mains programs for JPSC Prelims and JPSC Mains Exam preparation. Various Programs initiated by JPSC Notes are as follows:- For any doubt, Just leave us a Chat or Fill us a querry––

JPSC Mains Test Series 2022

Subscribe our Test Series program to get access to 20 Quality mock tests for JPSC Preparation.

Click Here for Mains Test Series and Notes

Click Here for Printed Notes (With COD)

Hope we have satisfied your need for JPSC Prelims and Mains Preparation

Kindly review us to serve even better

[jetpack_subscription_form title=”Subscribe to JPSC Notes” subscribe_text=”Never Miss any JPSC important update!” subscribe_button=”Sign Me Up” show_subscribers_total=”1″]