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甲烷(CH4)若用CI取代CH4上H后,其毒性最大的是( )。

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CH4、NH3、H2O、HF   HF、H2O、NH3、CH4   H2O、HF、CH4、NH3   HF、H2O、CH4、NH3、  
±0.20%CH4  ±0.10%CH4  ±0.01%CH4  ±0.05%CH4  
≥1.0%CH4;≥1.0%CH44;<1.0%CH4  ≥1.5%CH4;≥1.5%CH44;<1.0%CH4  ≥1.0%CH4;≥1.5%CH44;<1.0%CH4  ≥1.5%CH4;≥1.0%CH44;<1.0%CH4  
±0.20%CH4  ±0.10%CH4  真值的±10%CH4  真值的±20%CH4  
≥1.0%CH4;≥1.0%CH4;  ≥1.5%CH4;≥1.5%CH4;  ≥1.0%CH4;≥1.5%CH4;  ≥1.5%CH4;≥1.0%CH4;  
CH3Cl  CH2Cl2  CHCl3  CCl4  CCl3  
±0.1%CH4  ±0.2%CH4  0.1%CH4  0.2%CH4  
CH3Cl  CH2C12  CHCl3  CCl4  CCl3  
0.04%CH4,0.4%CH4  0.1%CH4,0.4%CH4  0.02%CH4,0.4%CH4  0.1%CH4,0.5%CH4  
CHCl  CHCl  CHCl  CCl  CCl  
0.1%CH4,0.1%CH4  0.1%CH4,0.4%CH4  0.01%CH4,0.1%CH4  0.01%CH4,0.01%CH4  
CH4 (g)+2NO2 (g)= N2 (g)+CO2 (g)+2H2O (l) △H.=-867 kJ·mol-1   若0.2 mol CH4还原NO2至N2,在上述条件下放出的热量为173.4 kJ   1molCH4催化还原NOx为N2的过程中,若x=1.6,则转移的电子为3.2 mol   若用4.48L CH4还原NO2至N2,整个过程中转移的电子为3.2 mol  
≥0.5%CH4,≥0.5%CH4,<0.5%CH4  ≥1.5%CH4,≥1.5%CH4,<1.5%CH4  ≥1.0%CH4,≥1.0%CH4,<1.0%CH4  

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