A、C<sub>2sub>H<sub>4sub> B、C<sub>3sub>H<sub>4sub> C、C<sub>2sub>H<sub>6sub> D、C<sub>2sub>H<sub>2sub>
A、C<sub>2sub>H<sub>4sub> B、C<sub>3sub>H<sub>4sub> C、C<sub>2sub>H<sub>6sub> D、C<sub>2sub>H<sub>2sub>
A、H<sub>2sub>S结构与H<sub>2sub>O相似 B、H<sub>2sub>S为极性分子,极性比水弱 C、常温常压下,H<sub>2sub>S为无色无毒气体 D、常温常压下,H<sub>2sub>S为臭鸡蛋气味气体
A、H<sub>2sub>SO<sub>4sub>Na<sub>2sub>CO<sub>3sub>BaCl<sub>2sub>HCl B、HClH<sub>2sub>SO<sub>4sub>Na<sub>2sub>CO<sub>3sub>BaCl<sub>2sub> C、Na<sub>2sub>CO<sub>3sub>H<sub>2sub>SO<sub>4sub>HClBaCl<sub>2sub> D、BaCl<sub>2sub>HClNa<sub>2sub>CO<sub>3sub>H<sub>2sub>SO<sub>4sub>
A、H<sub>2sub>S+1/2O<sub>2sub>=1/2S<sub>2sub>+H<sub>2sub>S B、CH<sub>4sub>+2O<sub>2sub>=CO<sub>2sub>+2H<sub>2sub>O C、2H<sub>2sub>S+3O<sub>2sub>=2SO<sub>2sub>+2H<sub>2sub>O D、COS+H<sub>2sub>O=CO<sub>2sub>+H<sub>2sub>S
A、KI B、Na<sub>2sub>S<sub>2sub>O<sub>3sub> C、KI<sub>3sub> D、KIO<sub>3sub>
A、NO<sub>2sub> B、CO<sub>2sub> C、H<sub>2sub>S D、SO<sub>2sub>
A、H<sub>2sub>O B、H<sub>2sub>S C、H<sub>2sub>Se D、H<sub>2sub>Te
A、CS<sub>2sub>+H<sub>2sub>O→COS+H<sub>2sub>S B、CS<sub>2sub>+2H<sub>2sub>O→CO<sub>2sub>+2H<sub>2sub>S C、CS<sub>2sub>+H<sub>2sub>O→CO+H<sub>2sub>S D、2CS<sub>2sub>+H<sub>2sub>O→2COS+<sub>2sub>
A、H<sub>2sub>S B、CO C、SO<sub>2sub> D、H<sub>2sub>