What are the materials present in urine?

Explanation

1) Urine contains 96 % of water, 2.5 % of organic substances like urea, uric acid, creatine, creatinine, water soluble vitamins, hormones and oxalates etc. and LS % of inorganic solutes like sodium, chloride, phosphate, sulphate, magnesium, calcium, iodine.
2) It is acidic in the beginning but becomes alkaline on standing due to decomposition of urea to form Ammonia.