作者clearfray (老虎奶油)
看板TransBioChem
標題[化學]
時間Mon Jun 22 13:27:44 2009
Consider the following molecules,
I. H2CH2 II.H2CCH2 III.H2CCCH2 IV.H2CCCCH2
Which of them will have all the hydrogen atoms lying on the same plane?
a.II only b.II and IV c. II and III d. II,III and IV
-----------------------------------------------------------------------
我選B 不知道對不對?
=======================================================================
The molecule Be2 is found to be a stable molecule, whereas He2 is
unstable. The major reason is because
A. Be2 has more empty molecular orbitals than He2
B. Be2 has less empty molecular orbitals than He2
C. The stabilization due to the s-p mixing in Be2
D. The destabilization due to the s-p mixing in He2
----------------------------------------------------------------------
這題我以為Be2和He2都不存在耶~BO不是等於零嗎@@ 請教大家了!
======================================================================
Which of the following species have the lowest LUMO(Lowest Unoccupied
Molecular Orbital)?
a. H2O b. H+ c. CH3COO- d. CH4
----------------------------------------------------------------------
有點不懂題目的意思,是選最容失去電子的(最酸的?)
======================================================================
最後想請教要怎麼判斷一個物質有optically active 呢?
以上! 先謝謝大家了!
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.129.77.5
1F：→ missass:你第一個問題選項C又打錯了= =... 06/22 18:10
2F：→ missass:D也錯ㄌ... 06/22 18:10
3F：→ mimipig:= = 06/22 18:19
4F：→ clearfray:那個...我不懂打錯了是什麼意思耶= ="題目真的是這樣... 06/22 18:28
5F：→ missass:BD選項一樣，C的答案是"II and II" 06/22 19:47
6F：→ missass:你的書不會也是張晉他們的吧...= =|||| 06/22 19:49
※ 編輯: clearfray 來自: 140.129.77.5 (06/22 20:09)
7F：→ clearfray:噢謝謝指正!我不是寫他們的書耶~純粹是自己眼殘⊙▽⊙ 06/22 20:11
8F：→ missass:請問你是用哪家的書阿~我想參考用><感恩~!! 06/22 20:20