1) 2NaI +Cl2 = 2NaCl + I2
I2 + H2 = 2HI
HI + NaOH = NaI + H2O
2) 2KBr + Cl2 = 2KCL + Br2
Br2+H2 = 2HBr
HBr + KOH= KBr + H2O
3) 2KI + Cl2 = 2KCl + I2
I2 + H2 =2HI
2HI + Ba(OH)2 = BaI2 + 2H2O
4) 2NaBr + Cl2 = 2NaCl + Br2
Br2 + H2 =2HBr
2HBr + Ba(OH)2 = BaBr2 + 2H2O