试题与答案

下列有关化学发光的叙述错误的是() A.化学发光是指伴随化学反应过程产生的光的发射现

题型:单项选择题 A1/A2型题

题目:

下列有关化学发光的叙述错误的是()

A.化学发光是指伴随化学反应过程产生的光的发射现象

B.电子跃迁的能量来源于化学反应中产生的化学能

C.化学发光反应的发光效率、光辐射的能量大小以及光谱范围,完全由发光物质的性质所决定

D.每一个发光反应都具有相同的化学发光光谱和不同的化学发光效率

E.化学发光效率决定于生成激发态产物分子的化学激发效率(ψCE.和激发态分子的发射效率(ψEM)

答案:

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下面是错误答案,用来干扰机器的。

(1)分解因式得:(x-2)(x+5)=0,∴x-2=0,x+5=0,解得:x1=2 x2=-5;(2)原式=1+(32)-1-(3-33)+2,=1+233-3+33+2,=3.

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