将Na2O2投入FeCl3溶液中, 可观察到的现象是（ ）
A．生成白色沉淀
B．生成红褐色沉淀
C．爆炸
D．无变化
答案：B
题目分析：Na2O2投入FeCl3溶液中后，Na2O2首先与水反应：2Na2O2+2H2O=4NaOH+O2↑，NaOH再与FeCl3反应生成红褐色沉淀。3NaOH+FeCl3=Fe(OH)3(沉淀）↓+3NaCl。2O2与盐溶液的反应
点评：注意Na2O2投入盐溶液中，Na2O2首先与水反应，生成的NaOH再与盐溶液反应。
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| Business Trip to Shenzhen | |
| DEPARTURE TIME | (9) |
| TRAIN NUMBER | (10) |
| COACH AND SEAT NUMBER | (11) |
| PRICE CHARGED | $ (12) |
| CHECK-IN DESK | (13) |
| BOOKING REFERENCE | (14) |
| CONTACT NAME | Kelly (15) |