Civil Engineering > GATE 2025 SET-2 > Wastewater Chemistry
A compound has a general formula CaHbOcNd and molecular weight 187. A 935 mg/l solution of the compound is prepared in distilled deionized water. The Total Organic Carbon (TOC) is measured as 360 mg/l (as C). The Chemical Oxygen Demand (COD) and the Total Kjeldahl Nitrogen (TKN) are determined as 600 mg/l (as O2) and 140 mg/l (as N), respectively (as per the chemical equation given below). Which of the following options is/are CORRECT?
CaHbOcNd + (4a+b-2c-3d)/4 O2 → aCO2 + (b-3d)/2 H2O + dNH3
Atomic weight: C(12), H(1), O(16), N(14)
CaHbOcNd + (4a+b-2c-3d)/4 O2 → aCO2 + (b-3d)/2 H2O + dNH3
Atomic weight: C(12), H(1), O(16), N(14)
Correct : a
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