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Verified answer
B.o Cr= +2 atau +3Dalam reaktan
K2CrO4
K= +1
O= -2
2-8=0
Cr= 8-2
Cr=> +6
Dalan produk
Cr2(SO4)³
Maka Cr=> +3
Jadi Cr mengalami penurunan biloks dari +6 ke +3
Jawabnya D