CaC 2 H 2 Orarr P Overset Red Hot Fe Tube Rarr Q Overset Conc HNO 3 Conc H 2 SO 4 77031

CaC 2 H 2 Orarr P Overset Red Hot Fe Tube Rarr Q Overset Conc HNO 3 Conc H 2 SO 4