BOTANY

Detailed explanation-1: -The correct answer is Corrosion. There are different types of chemical weathering processes such as solution, hydration, carbonation, oxidation, reduction, and biological. Hence corrosion is not a type of chemical weathering.

Detailed explanation-2: -The Important processes of chemical weathering are solution, carbonation, hydration, oxidation and reduction. These processes act on the rocks to decompose, dissolve or reduce them to a fine clastic state through chemical reactions by oxygen, surface and/or soil water and other acids.

Detailed explanation-3: -When cement, water, aggregate, and additives are mixed together, a significant heat increase occurs. This is due to the exothermic process in the reaction between cement and water (called hydration).

Detailed explanation-4: -Exfoliation involves the removal of the oldest dead skin cells on the skin’s outermost surface. Exfoliation is involved in all facials, during microdermabrasion or chemical peels. It is not a chemical weathering.

Detailed explanation-5: -Ans. Water, air, ice, temperature and the plants and animals of a particular region are the main agents of weathering and erosion.