问题 推断题

A、B、C、D、F五种物质的焰色反应均为黄色,A、B、C、D与盐酸反应均生成E,此外B还生成一种可燃气体。而C、D还生成一种无色无味气体H,该气体能使澄清石灰水变浑浊。D和A可反应生成C,F和H也可反应生成C和另一种无色无味气体。请回答下列问题:

(1)写出A、B、C、D、E、F的化学式 A________;B________;C________;D________;E________;F________。

(2)写出F和H反应的化学方程式 ____________________________。

(3)写出下列反应的离子方程式 :

①D+盐酸_____________________;

②B+水_______________________;

③D+A ______________________。

答案

(1)NaOH;Na;Na2CO3;NaHCO3;NaCl;Na2O2

(2)2Na2O2+2CO2===2Na2CO3+O2

(3)①HCO3+H===H2O+CO2↑;②2Na+2H2O===2Na+2OH+H2↑;③ HCO3+OH===H2O+CO32-

写作题
书面表达(本题共15分)

有一种节约叫光盘,有一种公益叫光盘!所谓光盘,就是吃光你盘子中的食物。拒绝浪费,珍惜粮食!针对这项行动,并根据以下提示,请你以No Wasting On Food为题写一篇短文,号召大家参与这项活动。
注意:1. 短文必须包括所有内容要点,可适当发挥;
2. 短文标题与开头已为你写好,不计入总词数;
3. 词数:90左右。
Reasons
a waste of food, money,
pollute the environment

Suggestions
eat up all your food / clear your plate; 
leftovers(剩饭菜)…
order less or smaller dishes

 
No Wasting On Food
Recently, many restaurants in our country have joined the “Clearing Your Plate” campaign(活动)against wasting food by offering smaller dishes.                                                
                                                                                      
                                                                                      
                                                                                      
                                                                                      
                                                                                      
                                                                                      
                                                                                      
                                                                                      
                                                                             
单项选择题