25 颗豆豆
1. 单选题
20 秒
What is the angle between bonding pairs of BeF2
180°
120°
117°
104.5°
2. 单选题
20 秒
What is the electron domain geometry for OF2
bent
triangular pyramidal
tetrahedral
trigonal planar
3. 单选题
20 秒
Which of the following bond has the greatest bond strength
C-O single bond
C-O double bond
C-O triple bond
All the bond strengths are equal
4. 单选题
20 秒
What is the molecular geometry for hydrocyanic acid
trigonal planar
linear
bent
tetrahedral
5. 单选题
20 秒
Which of the following is the correct lewis structure for C2H4
A
B
C
D
6. 单选题
20 秒
What is the angle between bonding pairs of BF3
120°
180°
117°
104°
7. 单选题
20 秒
Which of the following element has the greatest electronegativity
Carbon
Silicon
Sulfur
Fluorine
8. 单选题
20 秒
What is the electron domain geometry for CH2I2
linear
tetrahedral
trigonal planar
V-shaped
9. 单选题
20 秒
What is the molecular geometry for SCl2
bent
linear
trigonal planar
triangular pyramidal
10. 单选题
20 秒
Which of the following does not have resonance structures
O3
SO2
HCOO-
C2H4
11. 单选题
20 秒
Which of the following is the correct lewis structure for BSF
A
B
C
D
12. 单选题
20 秒
How many valence electrons does H2Se have
6
8
10
12
13. 单选题
20 秒
What is the electron domain geometry for H2Se
trigonal planar
linear
tetrahedral
bent
14. 单选题
20 秒
What is the molecular geometry for NOBr (N is the central atom)
bent
trigonal planar
linear
triangular pyramidal
15. 单选题
20 秒
Which of the following is the correct lewis structure for phosphite ion
A
B
C
D
16. 单选题
20 秒
How many electron domains does the central atom of CO2 have
4
2
3
1
17. 单选题
20 秒
What is the bond order for carbonate ion
3/2
4/3
1
5/4
18. 单选题
20 秒
What is the electron domain geometry for CCl2O
trigonal planar
triangular pyramidal
tetrahedral
V-shaped
19. 单选题
20 秒
Which one of the following can be a correct lewis structure for HCOO-
A
B
C
D
20. 单选题
20 秒
What is the electron domain geometry for H2O
linear
bent
tetrahedral
triangular pyramidal
21. 单选题
20 秒
What is the angle between bonding pairs of NH3
180°
120°
117°
107°
22. 单选题
20 秒
Which of the following chemical compound does not have coordinate bond
Hydronium
Carbon monoxide
Ammonium
Ammonia
23. 单选题
20 秒
What is the molecular geometry of SiF3-
tetrahedral
triangular pyramidal
trigonal planar
bent
24. 单选题
20 秒
Does benzene have resonance structure
Yes
No
25. 单选题
20 秒
What is the molecular geometry for N2O2-
bent
trigonal planar
triangular pyramidal
linear
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