Question 1

How many lone pairs of electrons are present around the central atom in CH4?

Accepted Answer

A)   0
B)   1
C)   2
D)   3
E)   4F) A) and B)
G) A) and E)

Question 2

Which of these elements has the lowest electronegativity?

Accepted Answer

A)   Ca
B)   N
C)   Se
D)   P
E)   OF) C) and D)
G) A) and B)

Question 3

Which of these is the correct formula for sodium phosphide?

Accepted Answer

A)   NaP
B)   NaP2
C)   Na3P
D)   NaP3
E)   Na3P2F) A) and E)
G) B) and E)

Question 4

The total number of valence electrons in NO  2  −  is _____.

Accepted Answer

A)   16
B)   17
C)   18
D)   15
E)   19F) A) and D)
G) D) and E)

Question 5

How many bonding pairs of electrons are present around the central atom in HCN?

Accepted Answer

A)   0
B)   1
C)   2
D)   3
E)   4F) A) and D)
G) A) and C)

Question 6

Which of the following is true about sodium?

Accepted Answer

A)   It is most stable as an atom.
B)   It is most stable as a negatively charged ion.
C)   It is most stable as a positively charged ion.
D)   All forms of sodium are very stable.
E)   All forms of sodium are very unstable.F) C) and E)
G) A) and B) C

Question 7

Which of the following is true of a nonpolar bond?

Accepted Answer

A)   One side of a nonpolar bond is electron deficient.
B)   A nonpolar bond is formed because of varying electronegativities in atoms.
C)   A nonpolar bond has an uneven electron distribution.
D)   Molecules in a nonpolar bond do not have a charge separation.
E)   None of theseF) C) and E)
G) A) and E)

Question 8

Which of these is the correct Lewis dot structure for sulfur?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) B) and C)
G) C) and D) D

Question 9

Which of these is the correct molecular geometry of BF3?

Accepted Answer

A)   Linear
B)   Trigonal planar
C)   Tetrahedral
D)   Trigonal pyramidal
E)   BentF) A) and E)
G) C) and E) B

Question 10

Which of the following is true according to the octet rule ?

Accepted Answer

A)   A stable electron configuration usually involves eight electrons.
B)   An atom must have eight protons.
C)   All elements with an atomic number of eight and above are metals.
D)   Eight electrons are transferred from one atom to another during ionic bonding.
E)   Elements with less than eight electrons have a linear molecular geometry.F) B) and E)
G) A) and E)

Question 11

Which of the following is true about a water molecule?

Accepted Answer

A)   It is a nonpolar molecule.
B)   It has a bent electron geometry.
C)   It has a linear molecular geometry.
D)   It has two lone pairs of electrons on the central atom.
E)   It contains two double bonds.F) A) and B)
G) A) and E)

Question 12

The element with the highest electronegativity is _____.

Accepted Answer

A)   fluorine
B)   hydrogen
C)   helium
D)   neon
E)   chlorineF) A) and D)
G) All of the above

Question 13

Which of the following is true of electronegativity?

Accepted Answer

A)   The elements at the bottom of the periodic table have greater electronegativity than the elements at the top of the table.
B)   The elements in the same row of the periodic table have equal electronegativity.
C)   The elements in the same column of the periodic table have equal electronegativity.
D)   The elements to the right of the periodic table have greater electronegativity than the elements to the left of the table.
E)   The elements in the periodic table are arranged in the decreasing order  of their electronegativity.F) A) and C)
G) A) and E)

Question 14

How many lone pairs of electrons are present around the central atom in H2O?

Accepted Answer

A)   0
B)   1
C)   2
D)   3
E)   4F) C) and D)
G) A) and B)

Question 15

Which of these will not form a positive ion in an ionic compound?

Accepted Answer

A)   Ba
B)   Rb
C)   P
D)   Sn
E)   MgF) A) and D)
G) A) and E)

Question 16

Which of these substances are ionic compounds?
I. NCl3
II. MgF2
III. AlBr3
IV. CH4

Accepted Answer

A)   I and II
B)   II and III
C)   II and IV
D)   II, III, and IV
E)   I and IVF) B) and E)
G) A) and B)

Question 17

Which of these substances are covalent compounds?
I. CaO
II. H20
III. PF3
IV. CH4

Accepted Answer

A)   I and II
B)   II and III
C)   II and IV
D)   II, III, and IV
E)   I, II, and IIIF) None of the above
G) A) and B)

Question 18

Which of the following is the molecular  geometry of NH3?

Accepted Answer

A)   Tetrahedral
B)   Bent
C)   Trigonal pyramidal
D)   Trigonal planar
E)   LinearF) C) and D)
G) A) and D)

Question 19

The averaging of two identical Lewis structures is called _____.

Accepted Answer

A)   reverberation
B)   resonance
C)   covalence
D)   shaping
E)   structuringF) B) and E)
G) None of the above

Question 20

How many lone pairs of electrons are present around the central atom in PCl3?

Accepted Answer

A)   0
B)   1
C)   2
D)   3
E)   20F) None of the above
G) B) and D)

Exam 5: Chemical Bonding

How many lone pairs of electrons are present around the central atom in CH4?

Correct AnswerverifiedShow Answer

Which of these elements has the lowest electronegativity?

Correct AnswerverifiedShow Answer

Which of these is the correct formula for sodium phosphide?

Correct AnswerverifiedShow Answer

The total number of valence electrons in NO 2 − is _____.

Correct AnswerverifiedShow Answer

How many bonding pairs of electrons are present around the central atom in HCN?

Correct AnswerverifiedShow Answer

Which of the following is true about sodium?

Correct AnswerverifiedC

Which of the following is true of a nonpolar bond?

Correct AnswerverifiedShow Answer

Which of these is the correct Lewis dot structure for sulfur?

Correct AnswerverifiedD

Which of these is the correct molecular geometry of BF3?

Correct AnswerverifiedB

Which of the following is true according to the octet rule ?

Correct AnswerverifiedShow Answer

Which of the following is true about a water molecule?

Correct AnswerverifiedShow Answer

The element with the highest electronegativity is _____.

Correct AnswerverifiedShow Answer

Which of the following is true of electronegativity?

Correct AnswerverifiedShow Answer

How many lone pairs of electrons are present around the central atom in H2O?

Correct AnswerverifiedShow Answer

Which of these will not form a positive ion in an ionic compound?

Correct AnswerverifiedShow Answer

Which of these substances are ionic compounds? I. NCl3 II. MgF2 III. AlBr3 IV. CH4

Correct AnswerverifiedShow Answer

Which of these substances are covalent compounds? I. CaO II. H20 III. PF3 IV. CH4

Correct AnswerverifiedShow Answer

Which of the following is the molecular geometry of NH3?

Correct AnswerverifiedShow Answer

The averaging of two identical Lewis structures is called _____.

Correct AnswerverifiedShow Answer

How many lone pairs of electrons are present around the central atom in PCl3?

Correct AnswerverifiedShow Answer

How many lone pairs of electrons are present around the central atom in CH₄?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The total number of valence electrons in NO ₂⁻ is _____.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified
D

Which of these is the correct molecular geometry of BF₃?

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

How many lone pairs of electrons are present around the central atom in H₂O?

Correct Answer
verified

Correct Answer
verified

Which of these substances are ionic compounds? I. NCl₃ II. MgF₂ III. AlBr₃ IV. CH₄

Correct Answer
verified

Which of these substances are covalent compounds? I. CaO II. H₂0 III. PF₃ IV. CH₄

Correct Answer
verified

Which of the following is the molecular geometry of NH₃?

Correct Answer
verified

Correct Answer
verified

How many lone pairs of electrons are present around the central atom in PCl₃?

Correct Answer
verified