Unit 2-Bonding and VSEPR

Question 1

2. Which molecule is non polar ?
   a) dihydrogen monoxide b) carbon tetra-iodide
   c) ammonia
   d) SCO
   e) CF2CL2

Answer 1

B

Question 2

20. Which INCORRECTLY completes this statement: A covalent bond …
    a) exists between two nonmetals
    b) exists between H and O in water
    c) exists between the two fluorine atoms in the fluorine diatomic molecule/
    d) must contain only one pair of electrons
    e) exists between H and Cl in hydrogen chloride

Answer 2

D

Question 3

17. Regarding a polar covalent bond, which statement is false?
    a) The atoms are different.
    b) The atoms differ in electronegativity. e)
    The electrons are held more closely by the more electronegative atom.
    d)
    The electrons are completely transferred from one atom to the other.
    e)
    There is a partially positive and partially negative end of the bond.

Answer 3

D

Question 4

25. In the VSEP model, valence pair around the central arom postion themselves to
    a) maximize electron pair repulsion
    b) reduce only bonding pair repulsion
    c) reduce only nonbonding pair repulsion
    d) make the angles between them as large as possible

Answer 4

D

Question 5

22. Which bond is approaching “nonpolar covalent status” the most?
    a) NO
    b) SiCl
    c) KCl
    d) SiBr
    e) CN

Answer 5

C

Question 6

21. How many lone pairs of electrons are on the B atom in BFIBr?
    a) 4
    b) 2
    c) 1
    d) 3
    e) 0

Answer 6

E

Question 7

1. What is a valid representation of the most stable cation of the element with Z=13?
   a) B3+
   b) B3-
   c) Al3+
   d) Al3-
   e) Al0

Answer 7

C

Question 8

3. What is the stock number for lead in PbF2?
   a) I
   b) II
   c) III
   d) IV
   e) 0

Answer 8

B

Question 9

4. How many valence electrons are shared between the carbon and oxygen nuclei in carbon monoxide?
   a) 1
   b) 2
   c) 4
   d) 6
   e) 0

Answer 9

D

Question 10

5. What is the empirical formula of strontium sulphide?
   a) SrSe
   b) SeSr
   c) SrS
   d) Sr2S2
   e) SSr2

Answer 10

C

Question 11

6. Which molecule is POLAR?
   a) N2
   b) HI
   c) CF4
   d) CS2
   e) CSe2

Answer 11

B

Question 12

7. What is the charge of the most stable anion of Cl?
   a) 2-
   b) 1
   c) 1-
   d) 0
   e) 2

Answer 12

C

Question 13

8. What is the stock number of iron cation in FeI3?
   a) I
   b) II
   c) III
   d) IV
   e) V

Answer 13

C

Question 14

9. Which of the following contains an IONIC bond?
   a) CF4
   b) RBCl
   c) H2O
   d) NF3
   e) CH4

Answer 14

B

Question 15

10. The most stable ionic compound between Al and S has empirical formula
    a) AlS
    b) Al3S2
    c) Al2S
    d) Al2S4
    e) Al2S3

Answer 15

E

Question 16

11. The most stable ionic compound between Na and N has a empirical formula
    a) NaN3
    b) NaN2
    c) Na3N
    d) NNa
    e) Na3N2

Answer 16

C

Question 17

12. Which of the following is NOT correct?
    a) CF4
    b) BrCl
    c) NBr3
    d) I2O
    e) BeF

Answer 17

E

Question 18

13. In combining with oxygen, which one of the following elements would form the bond with the least percent ionic character?
    a) Fr
    b) Li
    c) S
    d) F
    e) Be

Answer 18

C

Question 19

14. The total number of electrons in molecule of N2O2 is
    a) 2
    b) 32
    c) 28
    d) 30
    e) 38

Answer 19

D

Question 20

15. The total number of valence electrons in a. molecule of H2O is
    a) 2
    b) 16
    c) 8
    d) 6
    e) 18

Answer 20

C

Question 21

16. The total number of valence electrons in a molecule of ICA3 is
    a) 16
    b) 2
    c) 5
    d) 8
    e) 32

Answer 21

A

Question 22

18. Which of the following bonds has a valence electrons shared equally by both atoms?
    a) HCl
    b) NO
    c) KCl
    d) OO
    e) BrCl

Answer 22

D

Question 23

19. Of the following elements, Which is the most electronegative?
    a) CL
    b) O
    c) Se
    d) P
    e) He

Answer 23

B

Question 24

23. Which of the following bonds be least polar?
    a) KCl
    b) SiCl
    c) BrCl
    d) ClO
    e) CCl

Answer 24

C

Question 25

24. List the atoms that carry a positive partial (or complete) charge (in each bond).
    a) K, Si, Br, Cl, C
    b) Cl, Si, Br, Cl, C
    c) K, Si, Br, O, C

Answer 25

A

Question 26

26. In degrees the tetrahedral angle is approximately
    a) 90
    b) 120
    c) 107
    d) 109
    e) 180

Answer 26

D

Question 27

27. The number of VSEPR groups around As in AsF3 is
    a) 1
    b) 2
    c) 3
    d) 4
    e) 0

Answer 27

D

Question 28

28. the electron group geometry of SO2 is
    a) linear
    b) trigonal planar
    c) bent
    d) pyramidal
    e) tetrahedral

Answer 28

B

Question 29

29. The molecular geometry of HCP is
    a) bent
    b) trigonal planar
    c) linear
    d) pyramidal
    e) tetrahedral

Answer 29

E

Question 30

30. An example of a polar molecule is
    a) BCl3
    b) CF4
    c) O2
    d) HCl
    e) Cl4

Answer 30

D