Humic acid isolated from soil is

A. Aromatic with high molecular weight

B. Aromatic with low molecular weight

C. Aliphatic with high molecular weight

D. Aliphatic with low molecular weight

Answer: Option A

Solution(By Examveda Team)

Humic acid is a group of molecules that bind to, and help plant roots receive, water and nutrients. Humic acid increases nutrient uptake, drought tolerance, and seed germination. It also increases the microbial activity in the soil, making it an excellent root stimulator.
Humic acid can be isolated from the soil when soil is aromatic with high molecular weight.