A、O<sub>2sub> B、CO C、NH<sub>3sub> D、CH<sub>4sub>
A、(75%~85%)n<sub>Hsub>、(70%~80%)nH B、(75%~85%)n<sub>Hsub>、(60%~70%)nH C、(80%~90%)n<sub>Hsub>、(70%~80%)nH D、(80%~90%)n<sub>Hsub>、(60%~70%)nH
A、(NH<sub>4sub>)Fe(SO<sub>4sub>)<sub>2sub> B、(NH<sub>4sub>)2Fe(SO<sub>4sub>)<sub>2sub> C、(NH<sub>4sub>)Fe(SO<sub>3sub>)<sub>2sub> D、(NH<sub>4sub>)2Fe(SO<sub>3sub>)<sub>2sub>
A、NH<sub>3sub>的K<sub>bsub>太小 B、(NH<sub>4sub>)<sub>2sub>SO<sub>4sub>不是酸 C、(NH<sub>4sub>)<sub>2sub>SO<sub>4sub>中不含游离H<sub>2sub>SO<sub>4sub> D、NH4+的K<sub>asub>太小
A、(NH<sub>4sub>)<sub>3sub>PO<sub>4sub> B、(NH<sub>4sub>)<sub>2sub>HPO<sub>4sub> C、NH<sub>4sub>H<sub>2sub>PO<sub>4sub>
A、AgNO<sub>3sub>,NH<sub>4sub>SCN,酸性, (NH<sub>4sub>)2Fe(SO<sub>4sub>)2 B、AgNO<sub>3sub>,NH<sub>4sub>SCN,中性,K<sub>2sub>CrO<sub>4sub> C、AgNO<sub>3sub>,KC<sub>lsub>, 酸性, K<sub>2sub>Cr<sub>2sub>O<sub>7sub> D、AgNO<sub>3sub>,NH<sub>4sub>SCN,碱性, (NH<sub>4sub>)2Fe(SO<sub>4sub>)2
A、NH<sub>3sub>>H<sub>2sub>O>CH<sub>4sub> B、H<sub>2sub>O>NH<sub>3sub>>CH<sub>4sub> C、H<sub>2sub>O>CH<sub>4sub>>NH<sub>3sub> D、CH<sub>4sub>>NH<sub>3sub>>H<sub>2sub>O
A、NH<sub>3sub>.H<sub>2sub>O B、NH<sub>4sub>.H<sub>2sub>O C、NH<sub>3sub>OH D、NH<sub>4sub>OH
A、NH<sub>4sub>SCN见光易分解 B、NH<sub>4sub>SCN常含有硫酸盐、硫化物等杂质 C、NH<sub>4sub>SCN易潮解 D、NH<sub>4sub>SCN溶液不稳定