Teaching UP TGT Mock Test Series 2025 General Science Chemistry Chemical Reaction

নিচের কোন বিক্রিয়াটি জারণ - বিজারণ নয়?

1
2KCIO 3 → 2KCI + 3O 2
2
২KBr + CI 2 → 2 KCI + Br 2
3
BaCI 2 + Na 2 SO 4 → BaSO 4 + 2NaCl
4
I 2 + 2S 2 O 3 -2 → 2I - +S 4 O 6 -2
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