Question

1. the most important agent of chemical weathering is

carbonic acid
nitrogen oxide
water
sulfur

Explanation:

Chemical weathering involves processes where minerals react with substances. Water is crucial as it participates in hydrolysis, dissolution, and helps form acids (like carbonic acid). Carbonic acid is a product of water and CO₂, nitrogen oxide and sulfur are more related to acid rain formation but not the primary agent. Water is the most important agent as it's involved in many chemical weathering reactions directly and indirectly.

Answer:

C. water