题目

The Shiants, remote, cliff-edged islands off the coast of Scotland are home to 350,000 seabirds. This is the starting point for National Geographic contributor Adam Nicolson’s new book, The Seabirds Cry. Celebrating 10 species in detail, he describes the unbelievable recovery of seabirds and the many adaptations that have enabled them to survive and navigate the oceans, while sounding a loud call for their conservation among severely falling numbers.Speaking from his home in Sussex, England, Nicolson explains why guillemot (海雀) colonies are information exchange centers: how new research 17．Na2O2由于其具有咸味且价格便宜，常在非法食品制作时用作食盐的不合理替代品，因为亚硝酸钠有毒，含有工业盐的食品对人体危害很大，有致癌性．（1）亚硝酸钠可少量添加到食物中，用作食品的防腐剂（2）已知NaNO2能发生如下反应：2NaNO2+4HI═2NO↑+I2+2NaI+2H2O，该述反应的还原剂是HI，若反应中转移0.2mol电子，则参与反应的NaNO2为0.2mol（3）根据上述反应，鉴别NaNO2和NaCl．可选用的物质有：BDA．水    B．碘化钾淀粉试纸   C．淀粉    D．食醋   E．白酒（4）实验室模拟用以下反应合成亚硝酸盐C6H12O6+12HNO3=3HOOC-COOH+9NO2+3NO↑+9H2ONO+NO2+2NaOH=2NaNO2+2H2O2NO2+2NaOH=NaNO3+NaNO2+H2O其中第一个反应要控制反应液的温度在35～60℃条件下进行，原因是避免硝酸分解，降低原料利用率，第二个和第三个反应是NaOH溶液吸收反应生产的气体，所得溶液中的阴离子共有三种OH-、NO2-、NO3-，且第三种离子与NO2-的浓度之比为3：1．（5）亚硝酸钠能氧化酸性条件下的Fe2+，同时产生一种气体，该气体在空气中迅速变色，写出亚硝酸钠与亚铁离子反应的离子方程式Fe2++NO2-+2H+=Fe3++NO↑+H2O．