题目内容

透明有色溶液被稀释时,其最大吸收峰的波长位置将 ( )

A. 向长波方向移动
B. 不移动,但峰高值降低
C. 向短波方向移动
D. 不移动,但峰高值升高

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物质的颜色是由于选择性地吸收了白光中的某些波长的光所致,硫酸铜呈现蓝色是由于它吸收了白光中的 ( )

A. 蓝色光
B. 绿色光
C. 黄色光
D. 青色光

在分光光度法中,( )是导致偏离朗伯-比耳定律的因素之一

A. 吸光物质浓度大于0.01mol/L
B. 波长选择不当
C. 液层厚度
D. 大气压力

某吸光物质在一定条件下,摩尔吸光系数很大,则表明 ( )

A. 该物质的浓度很大
B. 光通过该物质溶液的光程长
C. 该物质对某波长的光吸收能力很强
D. 该物质的摩尔质量高

Vocabulary & Structure (15 minutes)Directions: This part is to test your ability to construct correct and meaningful sentences. It consists of 2 sections.Section ADirections: In this section, there are 10 incomplete sentences. You are required to complete each one by decidingon the most appropriate word or words from the 4 choices marked A), B), C) and D). Then you should mark the corresponding letter on the Answer Sheet with a single line through the center.16. A recent study shows that a person’s living conditions only ________________ about 50 percent of his or her happiness.

A. account for
B. turn on
C. take away
D. send out