污染

为了消除排出的废气中所含的氯气对环境的污染,将此废气通过混有过量铁粉的氯化亚铁溶液中,就可有效地除去氯气.除氯过程中,FeCl2的作用是____,Fe的作用是____(均用化学方程式表示).

为了消除排出的废气中所含的氯气对环境的污染,将此废气通过混有过量铁粉的氯化亚铁溶液中,就可有效地除去氯气.除氯过程中,FeCl2的作用是\_\_\_\_,Fe的作用是\_\_\_\_(均用化学方程式表示).

在下列操作中,仪器间不应接触的是(  ).①用胶头滴管向试管内滴液时,尖嘴与试管口或试管壁②向容量瓶注入液体时,玻璃棒与容量瓶壁③向试管内注入液体时,试剂瓶口与试管口④检验试管内是否有氨气产生时,石蕊试纸与试管口

在下列操作中,仪器间不应接触的是(  ).①用胶头滴管向试管内滴液时,尖嘴与试管口或试管壁②向容量瓶注入液体时,玻璃棒与容量瓶壁③向试管内注入液体时,试剂瓶口与试管口④检验试管内是否有氨气产生时,石蕊试纸与试管口

Practice 12  (1) Whatever its underlying reason, there is no doubt that much of the pollution caused could be controlled if only companies, individuals and governments would make more efforts. In the home there is an obvious need to control litter and was

Practice 12  (1) Whatever its underlying reason, there is no doubt that much of the pollution caused could be controlled if only companies, individuals and governments would make more efforts. In the