Q.
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a
Cr2O72-+2O⊝H→ CrO42-+H2O
b
SO52-+2I⊝+2H⊕→ I2+SO42-
c
2Ca(OH)2+2Cl2→ Ca(CIO)2+CaCl2+2H2O
d
PCl5→ PCl3+Cl2
answer is A.
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