A ①③ B ②③ C ①④ D ①③④

A 乙烯使溴水褪色 B 氯气使湿润的红色布条褪色 C 乙炔使酸性高锰酸钾溶液褪色 D 淡蓝色的液氧变成无色的氧气

A 水结成冰 B 汽油燃烧 C 石蜡熔化 D 纸张粉碎

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109154474787478.jpg" alt="" border="0" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109154438763876.jpg" alt="" border="0" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109154454115411.jpg" alt="" border="0" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109154439133913.jpg" alt="" border="0" />

A 化合反应的反应物一定都是单质 B 分解反应的反应物不一定都是化合物 C 复分解反应的反应物都是化合物 D 置换反应的反应物中一定有金属单质

A 氯酸钾 B 液氧 C 二氧化碳 D 氧化铁

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109154425782578.jpg" alt="" border="0" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109154454135413.jpg" alt="" border="0" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109154486718671.jpg" alt="" border="0" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109154442534253.jpg" alt="" border="0" />

A 1：9 B 9：1 C 295 D 5：2

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109154460146014.jpg" alt="" border="0" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109154580558055.jpg" alt="" border="0" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109154546434643.jpg" alt="" border="0" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109154571327132.jpg" alt="" border="0" />

A S B <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109154554425442.jpg" alt="" border="0" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109154586718671.jpg" alt="" border="0" /> D Na