题目

焦亚硫酸钠(Na2S2O5)是的食品抗氧化剂之一。某研究小组进行如下实验： 实验一 焦亚硫酸钠的制取 采用如图装置(实验前除尽装置内的空气)制取Na2S2O5。装置Ⅱ中有Na2S2O5晶体析出，发生的反应为Na2SO3 ＋ SO2 = Na2S2O5。 ⑴ 装置Ⅰ中产生气体的化学方程式为________________________________； ⑵ 上图中盛装浓硫酸的玻璃仪器的名称是:__________________________; ⑶ 装置Ⅲ用于处理尾气，可选用的最合理装置(夹持仪器已略去)为_________ (填序号)。 实验二 焦亚硫酸钠的性质完形填空(每小题1分，共K) 分)(2015江苏江阴中学一模) BEIJING—The sky is gray and air smells strange.It’s another day of smog.On Saturday,heavy haze (雾霾) still covered North and East China. Highways were closed and 31        couldn’t take off on time.The smoggy weather 32        the country’s land from north to south,including Beijing,Hebei,Shandong,and 6 other provinces.People could only see clearly 33        than 50        meters in some areas.Cities 34       Shanghai and Nanjing have been covered by the gray sky for the past several days.Many walkers in the streets had to wear 35       . At the Lukou airport in Nanjing,more than 60        flights were canceled (取消) on Saturday 36        the haze,which also made primary and middle schools and kindergartens stop 37        on Thursday and Friday in Nanjing.The office worker of Environmental Protection said earlier this week that there were several 38        reasons behind the widespread haze ： unpleasant weather conditions making 39        difficult for smog to disappear,automobile exhaust (尾气) ，and coal use for winter heating.To fight pollution,the Chinese government now plans to clean the air by cutting coal use,40      some factories,and removing 6 million old cars from the roads.“We must face up to the facts ,” said Yan Naiqiang,a professor of environmental science at Shanghai Jiao Tong University.“The treatment of smog will be a long fight.From now on,if we use buses or cars less and do more riding,we believe a clear sky is not a faraway dream."  31. A. coaches   B. trains   C. flights   D. doubledeckers  32.A. afforded   B. affected   C. admired   D. announced  33. A. less   B. more   C. farther   D. nearer  34. A. in   B. like   C. around   D. outside  35. A. hats   B. gloves    C. sunglasses   D. masks  36. A. besides   B. except   C. because of   D. for  37.  A. classes   B. rest   C. work   D. shopping   38.   A. mainly   B. mostly   C. main   D. most  39.  A. that   B. this   C. one   D. it  40. A. close   B. closing   C. open   D. opening