Match List – I (Estimated method) with List – II (Corresponding indicator) and select the correct answer using the codes given below the lists:
|
List – I |
List – II |
|
P. Azide modified Winkler method for dissolved oxygen |
1. Eriochrome Black T |
|
Q. Dichromate method for chemical oxygen |
2. Ferroin |
|
R. EDTA titrimetric method for hardness |
3. Potassium chromate |
|
S. Mohr or Argentometric method for chlorides |
4. Starch |
1
P-3 Q-2 R-1 S-4
2
P-4 Q-2 R-1 S-3
3
P-4 Q-1 R-2 S-3
4
P-4 Q-2 R-3 S-1