Naici series twelve solar terms

A, according to Cl2+2KBr═2KCl+Br2, it is known that the oxidizability is Cl2>Br2, which accords with the known oxidizability relationship, so the chemical equation is established, so A is not selected;

B, according to 2NaCl+I2═Cl2+2NaI, we know that the oxidation is I2 > Cl2, but in fact the oxidation is I2>Cl2 > I2, so the chemical equation is not established, so we choose B;

C, according to Cl2+2HI═2HCl+I2, the oxidation is Cl2 > I2, which accords with the known oxidation relationship, so the chemical equation is established, so C is not selected;

D, press MnO2+4HCl (concentrated) △. MnCl2+2H2O+Cl2↑ The known oxidation is MnO2 > Cl2, which accords with the known oxidation relationship, so the chemical equation is established, so D is not selected;

So choose B.