JEE Mains Model Paper 21
© examsiri.com
Question : 60 of 90
Marks:
+1,
-0
100 ml of a sample of water requires 1.96 mg of K 2 C r 2 O 3 in the presence of 50% H 2 S O 4 for the oxidation of dissolved organic matter in it. then COD is
Go to Question: