CaC 2 H 2 Orarr P Overset Red Hot Fe Tube Rarr Q Overset Conc HNO 3 Conc H 2 SO 4 76788

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