一道英文化学题,大概高三到大二的难度

一道英文化学题,大概高三到大二的难度
tell me which one ever u know please:
just tell me why they're the right answer cause they're the answer key
1.which substance can be described as cation bonded together by mobile electrons?
B.Ag(s)
10.you are given the following boiling point data:which one of the below liquid would you expect to have highest vapor pressure at room tempature
a.diethyl ether 34.5 C
b.ethylene glycol 198C
c.methanol 64.96C
d.ethanol 78.5C
e.water 100C
3.which one of the following statements about solid Cu is incorrect?
a.the solid has a cubic closet-packed structure
4.the molecule in a sample of solid SO2 are attracted to each other by combination of
b.london forces and dipole-dipole interaction
知道一个也可以
补充：第3个答案是 A
如果可以,请用英文回答.