题目

Probably one thing that Armenians wouldn’t forget when they sit at the table is bread. Armenians knew how to make wine and bake bread from the ancient times. Perhaps the pride of Armenian cuisine is the traditional and national bread Lavash.Lavash is a traditional Armenian thin bread. The preparation of this demands special skills and great effort. In most cases, making tools is the duty of men but preparing bread is the job of women.Generally, tondir, the most important tool, is located underground. For making Lavash, Armenians use flour, water, and salt. Firstly they make dough (面团) fr 已知A为淡黄色固体，T、R为两种常见的用途很广的金属单质，D是具有磁性的黑色晶体， C是无色无味的气体，H是白色沉淀。推断A—W物质各是什么，回答下列问题。   （1）写出下列物质的化学式： D：              N：              。 （2）A和水的反应属于下列何种反应类型          （填序号） 。 A. 化合反应       B. 氧化还原反应     C. 离子反应    D. 置换反应 （3）若要确定E溶液中是否含有W物质，所选试剂为       （填序号）。 A.氯水和KSCN溶液          B. KSCN溶液 C. 浓氨水                  D. 酸性高锰酸钾溶液 （4）B与E混和得到H并在潮湿空气中变成M的过程中，可能观察到的现象：                                                     ； （5）B和R反应生成N的离子方程式：                                     ； M→W的离子方程式：                                               ；