清晨,松树林中的空气格外清新,是因为有极少量的氧气能够变成臭

清晨,松树林中的空气格外清新,是因为有极少量的氧气能够变成臭氧,反应的化学方程式为:3O2====2O3。下列有关该反应的说法正确的是(    )

A.这是一个氧化还原反应                    B.臭氧与氧气是氧的同素异形体

C.臭氧与氧气是氧的同位素                 D.产生的臭氧可以填充“臭氧空洞”

答案

B  

【解析】本题考查了氧化还原反应的实质及同素异形体与同位素的区别。氧化还原反应的实质是电子的得失,表现为化合价的升降,而氧气与臭氧的转换无化合价的升降;同素异形体的研究对象是单质,而同位素的研究对象是原子。

相关题目

下表选项中,除去物质中所含杂质的方法正确的是 (    ) 选
下表选项中,除去物质中所含杂质的方法正确的是 (    ) 选项物质所含杂质除去杂质的方法 A氯化钠溶液氢氧化钠加入稀盐酸至pH<7 B铁粉铜粉加入
已知函数。 (1)当时,求的单调区间; (2)是否存在实数
已知函数。 (1)当时,求的单调区间; (2)是否存在实数,使得对任意的,不等式恒成立?若存在,求出所有的值;若不存在,请说明理由。
(1)将log232=5化成指数式;(2)将3-3=化成对数式;(3)已知log4x=-
(1)将log232=5化成指数式;(2)将3-3=化成对数式;(3)已知log4x=-,求x;(4)已知log2(log3x)=1,求x.
Shu-How Lin is now one of_______ basketball players in the NBA. A. popular B.
Shu-How Lin is now one of_______ basketball players in the NBA. A. popular B. less popular C. more popular D. the most popular
The book which is ________ of being read a second time is _________15 dollars.
The book which is ________ of being read a second time is _________15 dollars. A. worthy, worthy  B. worth; worth     C. worthy; worth     D. worthwhile; worthy
Interpersonal Distance With the outbreak of SARS,everyone tried to avoid coming
Interpersonal Distance With the outbreak of SARS,everyone tried to avoid coming into close contact with each other.In those days,interpersonal distance increased,“close contact” almost became syno
阅读下面的短文,完成15—17题。(12分) 万物的生灵——太
阅读下面的短文,完成15—17题。(12分) 万物的生灵——太阳 ①太阳是太阳系的中心天体,太阳质量占太阳系的99.86%,是距离地球最近的一颗恒星
D Dear Economist, My newly-wedded wife and I are deeply in love.There is, howe
D Dear Economist, My newly-wedded wife and I are deeply in love.There is, however, one issue that threatens the happiness of our marriage.I absolutely insist on shopping at Walmart.My wife, mean

最新题目