A $K_{2}Cr_{2}O_{7 }$ ও $H_{2}SO_{4}$
B $H_{2}SO_{4}$ ও $MnO_{2}$
C $NH_{4}Cl$ ও $MnO_{2}$
D $CuSO_{4}$ ও $ZnSO_{4}$
Correct Answer: Option C
Download our app for free and access thousands of MCQ questions with detailed solutions