A small amount of N 2 O 4 (or NO 2) will be released when fuel is burned, which will cause air pollution, and A is incorrect; N 2 O 4 is an oxidant, unsymmetrical dimethylhydrazine is a reducing agent, CO 2 is an oxidation product, N 2 is both an oxidation product and a reduction product, B is correct and C is incorrect; According to N 2 O 4 analysis, for every 3 moles of N 2 generated, the number of transferred electrons is 16N A, so the number of transferred electrons generating 0.6 moles of N2 should be 3.2N A, and D is incorrect.