题目

Adrian’s “Amazing Race” started early when his parents realized that he, as a baby, couldn’t hear a thing, not even loud noises. In a special school for the hearing-impaired，he learned sign language and got to mix with other disabled children. However, the sight of all the disabled children communicating with one another upset his mother. She wanted him to lead a normal life. So after speaking to an advisor, she sent him to private classes where he learned to read lips and pronounce words.     Later on, Adrian’s parents decided to send him to a regular school. But the headmaste实验室在制取某些产品时，当产品的沸点高于反应物的沸点时，常需要用冷凝回流的方法以提高反应物的利用率．若已知有试剂：a、液溴；b、铁粉；c、苯；d、氢氧化钠溶液；e、蒸馏水；又知下列物质的沸点：①溴苯为156℃；本为80℃；液溴为58.78℃．且现有如图装置(铁架台等固定用装置已略去)： 实验室欲制取溴苯： (1)为了提高溴苯的产率，选用________装置为最佳：(填序号) (2)向容器中加入试剂的顺序是________；(填试剂序号) (3)发生反应的化学方程式________； (4)你选择的装置有缺陷，应如何完善________． (5)用此法制得的溴苯常呈褐色，欲除去褐色应加入试剂________． (6)为了获得纯净的溴苯，应把(5)操作后得到的混合液进行________(填一种操作名称)，再进行________(填一种操作名称)，进行该项实验所需的仪器名称是________．