Cr+H2SO4= Cr+Hbr= Cr+H3PO4= Cr+H2SO3= Cr+H2S=

Question

Cr+H2SO4=
Cr+Hbr=
Cr+H3PO4=
Cr+H2SO3=
Cr+H2S=

Answer 1

2Cr+ 6H2SO4=>Cr2(SO4)3+6H2O+3SO2
Cr+3Hbr=>CrBr2+H2
2Cr+3H2S=>Cr2S3+3H2
4Cr + 10H3PO4 => 3P2O3 + 4CrPO4 + 15H2О