10. 由C5H10、C3H6O2和C6H12O6组成的混合物,经测定含氧元素的质量分数为x,则此混合物中含碳元素的质量分数为····················································································( )
A. B. C. D. 无法计算
9.具有解热镇痛及抗生素作用的药物“芬必得”主要成分的结构简式为,它属于·························································( )
①芳香族化合物;②脂肪族化合物;③有机羧酸;④有机高分子;⑤芳香烃
A.③⑤ B. ②③ C.①③ D. ①④
8. 已知乙烯分子呈现平面结构且碳碳双键(C=C)不能旋转,因此1,2-二氯乙烯可以形成和两种不同的空间异构体。下列各物质中,能形成类似上述两种空间异构体的是········································································································( )
A. CH2=CCl2 B. CH3CH=CH2 C. CH3CH2CH=CH2 D.CH3CH=CHCH3
7. 下列物质中,碳的质量分数相同的是·········································································( )
A. CH4、C2H6 B. HCHO、C6H12O6 C. CH3CH2OH、CH3COOH D. 、
6. 有机物分子中最多有多少个原子共面··········( )
A. 12 B. 16 C. 20 D. 24
5. 被成为“脑黄金”的DHA是一种高级脂肪酸,它的分子中含6个碳碳双键,学名为二十六碳六烯酸,它的分子组成应是··············································································( )
A. C25H51COOH B. C25H39COOH C. C26H43COOH D. C26H47COOH
4. 某烃的结构简式为 ,分子中含有四面体结构的碳原子数为a,在同一条直线上的碳原子数最多为b,一定在同一平面内的碳原子数为c,则a、b、c分别是·················································································································( )
A. 4、3、5 B. 2、5、4 C. 4、3、6 D. 4、6、4
3. 下列关于有机化学发展史的说法错误的是·······························································( )
A. 中国科学家成功合成了结晶牛胰岛素,标志着人类合成蛋白质时代的开始
B. 德国化学家李比希提出运用同位素示踪法研究化学反应历程
C. 瑞典科学家贝采利乌斯提出有机化学的概念,使之成为化学的一个重要分支
D. 德国化学家维勒用氰酸铵合成尿素,从而打破了无机物和有机物的界限
2. 自然界中化合物的种类最多的是···············································································( )
A. 无机化合物 B. 有机化合物 C. 铁的化合物 D. 碳水化合物
1. 有机化学主要研究有机化合物所发生的反应,下列化合物中不是有机物的是···· ( )
A. CO2 B. C2H6 C. HCHO D. CH3OH
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