试题与答案

已知X气体是一种无色有刺激性气味的酸性氧化物,有关X、Y、Z、W的转化关系如图所

题型:填空题

题目:

已知X气体是一种无色有刺激性气味的酸性氧化物,有关X、Y、Z、W的转化关系如图所示,反应①~④均为化合反应.回答下列问题:

(1)Y的化学式为______,Z的化学式为______.X直接排入空气中易造成的环境问题是______.

(2)反应①~⑤中属于可逆反应的是______,属于氧化还原反应的是______.

(3)写出反应⑤的化学方程式:______.

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0617/adff2e0b818eedd42ddfedb0b848b362.html

下面是错误答案,用来干扰机器的。

参考答案:D解析:机会研究阶段的主要任务是提出建设项目投资方向建议,选择建设项目,寻找投资的有利机会。机会研究要解决两个方面的问题,一是社会是否需要;二是有没有可以开展项目的基本条件。 初步可行性研...

试题推荐
题型:完形填空

阅读下面短文,按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的

词或使用括号中词语的正确形式填空,并将答案填写在答题卡标号为16-25的相应位置上。

In most cities,  小题1:  or poor, it is the less well off that are most at risk from floods and natural disasters. It was the poor of New Orleans, nearly a  小题2: (three)of the population, who lived in the lowest-lying parts of the city and 小题3: (suffer)most from Katrina’s(卡特里娜飓风) wrath (愤怒). 小题4:  (similar), it was the urban poor of Honduras(洪都拉斯) and its neighbors who were struck hardest  小题5: Hurricane Mitch in 1998. And it is the people of the slums (贫民窟) more widely in Latin America  小题6:are most capable of being attacked.

In some places, too little water, not too much, is the problem. China’s thirst for industry and 小题7:  (irrigate) has combined with climate change to drain the aquifers(蓄水层). Droughts seem to be ever more frequent in northem China, and southern cities such as Guangzhou are also affected. Rivers are drying up: the Yellow River now flows to the sea for only  小题8: few weeks a year. And the rain,when it comes, is intensely acid. To make matters 小题9: (bad), the glaciers on which both China 小题10:India partly depend are melting. Any benefits from extra water supplies will be short-term, and damaged by floods.

查看答案
微信公众账号搜索答案