Chromium in Its +VI Oxidation State Is Considered a Hazardous,carcinogenic

Multiple Choice

Chromium in its +VI oxidation state is considered a hazardous,carcinogenic species,destruction of which may be accomplished by the process symbolized as:
4 Zn + K₂Cr₂O₇ + 7 H₂SO₄ → 4 ZnSO₄ + 2 CrSO₄ + K₂SO₄ + 7 H₂O
If 1.0 mol of each reactant is mixed,what is the limiting reagent,and what is the theoretical yield in moles of chromium(II) sulfate?

A) limiting reagent Zn,0.50 mol chromium(II) sulfate
B) limiting reagent K₂Cr2O₇,2.0 mol chromium(II) sulfate
C) limiting reagent H₂SO₄,0.29 mol chromium(II) sulfate
D) limiting reagent H₂,1.0 mol chromium(II) sulfate
E) no limiting reagent,1.0 mol chromium(II) sulfate