鉴别NO2气体和Br2蒸气,可用(    ) A.湿润的KI淀粉试纸       

鉴别NO2气体和Br2蒸气,可用(    )

A.湿润的KI淀粉试纸               B.AgNO3溶液

C.水                              D.烧碱溶液

答案

BC


解析:

NO2和Br2都有较强氧化性,并且均可以与碱溶液反应,所以A、D不行。

相关题目

穿过长江中下游的铁路干线自西向东排列依次是 A.成昆线、
穿过长江中下游的铁路干线自西向东排列依次是 A.成昆线、焦柳线、京沪线 B.焦柳线、京九线、沪杭线 C.京九线、京广线、焦柳线 D.焦柳线、京广
赋值语句s=s+2的含义是( ) A.将s的值赋给s+2 B.将s的值
赋值语句s=s+2的含义是( ) A.将s的值赋给s+2 B.将s的值加2后赋给s C.s和s+2相等 D.无法运行因为s=s+2不成立
Unhappy people glue(使粘牢) themselves to the television 30 percent more
Unhappy people glue(使粘牢) themselves to the television 30 percent more than happy people. The finding, announced on Thursday,   1  from a survey of nearly 30,000 American adults conducted
公比为2的等比数列{an}的各项都是正数,且a3a11=16,则a5等于( ) (
公比为2的等比数列{an}的各项都是正数,且a3a11=16,则a5等于( ) (A)1    (B)2    (C)4    (D)8
    假定英语课上老师要求同桌之间交换修改作文,请你修
    假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。文中共有10处错误,每句中最多有两处。错误涉及一个单词的增加
 ----The boss expressed his satisfaction with your wonderful work.----Really? I
 ----The boss expressed his satisfaction with your wonderful work.----Really? I ____ better under more favorable conditions.A. could do                  B. should do         
依次填入下列横线处的词语,最恰当的一组是 ①我掉首东顾
依次填入下列横线处的词语,最恰当的一组是 ①我掉首东顾,只见云雾弥漫,山峦隐现,绚烂的彩霞竟然已经渺无    ! ②故乡的小溪永远在我的心
Much to our surprise, the first performance was well         .   A. acc
Much to our surprise, the first performance was well         .   A. accepted    B. received   C. accepting      D. receiving  

最新题目