潍坊学院成人教育化学工程与工艺《专业英语》试题(B)试题及
参考答案
I.choose the right answer.(10分)
1. Alkanes are _____in water because the polar water molecules are not attracted to the non-polar alkane molecules. However alkanes are _____ in non-polar solvents such as Carbon Tetrachloride,CCl4. A insoluble B soluble C X
2. _____ are hydrocarbons that have at least one triple co-valent bond between two adjacent carbons.
A alkene B alkane C alkyne
3. A man by the name of Huckel came up with a mathematical rule which assumed a monocyclic planar ring system having _____ Pi electrons within the cyclic system where n = any integer beginning with the integer zero.
A 2n+1 B 4n C 4n + 2
4. ______ are an exciting new classification of aromatic organic molecules that consist of pure carbon. The formula for Fullerenes are either C60 or C70. The shape of these remarkable allotropic forms of pure carbon are shaped like soccer balls or icosahedrons. A Fullerenes B Diamond C Polymer
5. Benzene and its derivatives undergo substitution reactions where a hydrogen attached to a carbon atom in the ___ is replaced by an
潍坊学院成人教育专业英语(B)试卷及参考答案
