Compounds that should not be used as primary standards in titrimetric analysis are : A. NaCrO B. Oxalic acid C. NaOH D. FeSO.6HO E. Sodium tetraborate
Choose the most appropriate answer from the options given below :
- A
B and D Only
- B
D and E Only
- C
C, D and E Only
- D
A, C and D Only
