During Urea hydrolysis pH of the soil system attains a value

A. 6.5

B. 7.8

C. 9.0

D. 10.5

Answer: Option C

Solution(By Examveda Team)

During Urea hydrolysis pH of the soil, the system attains a value of 9.0.
Urea hydrolysis is a chemical reaction that occurs in soils, to transform the urea in urine into ammonia and bicarbonate, resulting in ammonia volatilization and mineral scaling. The pH is shifted from 6.8 to 9 and is detected by the change of colour of phenol red from light orange to magenta.