Q381
During Urea hydrolysis pH of the soil system attains a value
A.
6.5
B.
7.8
C.
9.0
AnswerD.
10.5
Answer: Option C
Solution
Answer: Option C
Solution:
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.