Question 1

What is the approximate NNC bond angle in azidocarbonamide, H2NC(O) NNC(O) NH2?

Accepted Answer

A)   118 ∘\circ∘ 
B)   180 ∘\circ∘ 
C)   90 ∘\circ∘ 
D)   107 ∘\circ∘ 
E)   109 ∘\circ∘

Question 2

Which of the following has bond angles of 120 ∘\circ∘ ?

Accepted Answer

A)   HO2-
B)   CS32-
C)   S32-
D)   O3 
E)   NO2-

Question 3

What are the electron arrangements and the shape around the central atom of SeCl4?

Accepted Answer

A)   Octahedral and square pyramidal
B)   Both tetrahedral
C)   Trigonal bipyramidal and seesaw
D)   Both square pyramidal
E)   Seesaw

Question 4

Which of the following species has bonds with the most ionic character?

Accepted Answer

A)   CO2 
B)   NO2 
C)   SnO2 
D)   P4O10 
E)   PCl3

Question 5

The electronegativity of an element can be expressed as ½(I + Ea) where I is the ionization energy and Ea is the electron affinity.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following has bond angles of 180 ∘\circ∘ ?

Accepted Answer

A)   N2O
B)   ClO2-
C)   O3 
D)   HO2-
E)   NH2-

Question 7

How many lone pairs of electrons are found in the Lewis structure of hydrazine, H2NNH2?

Accepted Answer

A)   8
B)   4
C)   1
D)   0
E)   2

Question 8

If the following all crystallize in the same type of structure, which has the lowest lattice energy?

Accepted Answer

A)   CaO
B)   BaS
C)   SrO
D)   SrS
E)   BaO

Question 9

All the following are polar except

Accepted Answer

A)   O3. 
B)   ClF3. 
C)   COCl2. 
D)   BrO3-
E)   CS32-.

Question 10

The molecule cis-dichloroethene is nonpolar.

Accepted Answer

A) True 
 B)False  False

Question 11

For the Lewis structure of the cyanamide ion that contains two double bonds, N=C=NH-,The hybrid orbitals used by the underlined nitrogen atom and the carbon atom,Respectively,Are

Accepted Answer

A)   sp2 and sp3. 
B)   sp and sp.
C)   sp2 and sp2. 
D)   sp and sp3. 
E)   sp2 and sp.

Question 12

For the ground-state ion Sn4+, what type of orbital do the electrons with highest energy reside in?

Accepted Answer

A)   4p
B)   5p
C)   4f
D)   4d
E)   5s

Question 13

Which of the following molecules is (are)  polar?
(a) AsCl4+ (b) I3+ (c) I3-(d) N3-(e) S32-

Accepted Answer

A)   (b)  and (e) 
B)   (b)  and (c) 
C)   (c)  and (e) 
D)   only (e)

Question 14

What is the ground-state electron configuration of O2-?

Accepted Answer

Question 15

If 346 kJ.mol-1 is released in the reaction Na(g)+ Cl(g)$\rightarrow$ Na+Cl-(g), is the energy change for the reaction Na+Cl-(g)$\rightarrow$  NaCl(s) endothermic or exothermic?

Accepted Answer

Question 16

What is the shape of IF4+?

Accepted Answer

A)   Tetrahedral
B)   Seesaw
C)   Trigonal bipyramidal
D)   Square planar
E)   T-shaped

Question 17

Which of the following is polar?

Accepted Answer

A)   SF6 
B)   ICl4-
C)   SF4 
D)   AsF6-
E)   XeF4  C

Question 18

The hybrid orbitals used by the underlined atoms in CH3CHCHCN, from left to right, Respectively,Are

Accepted Answer

A)   sp3 and sp.
B)   sp2 and sp.
C)   sp2 and sp3. 
D)   sp2 and sp2. 
E)   sp and sp3.

Question 19

What is the shape of BrO4-?

Accepted Answer

A)   Tetrahedral
B)   Trigonal bipyramidal
C)   Seesaw
D)   T-shaped
E)   Square planar A

Question 20

Which of the following is a p-type semiconductor?

Accepted Answer

A)   Selenium doped with indium
B)   Silicon doped with arsenic
C)   GaAs with arsenic in excess of gallium
D)   Germanium doped with arsenic
E)   Silicon doped with phosphorus

Exam 2: Molecules

What is the approximate NNC bond angle in azidocarbonamide, H2NC(O) NNC(O) NH2?

Correct AnswerverifiedShow Answer

Which of the following has bond angles of 120 ∘\circ∘ ?

Correct AnswerverifiedShow Answer

What are the electron arrangements and the shape around the central atom of SeCl4?

Correct AnswerverifiedShow Answer

Which of the following species has bonds with the most ionic character?

Correct AnswerverifiedShow Answer

The electronegativity of an element can be expressed as ½(I + Ea) where I is the ionization energy and Ea is the electron affinity.

Correct AnswerverifiedShow Answer

Which of the following has bond angles of 180 ∘\circ∘ ?

Correct AnswerverifiedShow Answer

How many lone pairs of electrons are found in the Lewis structure of hydrazine, H2NNH2?

Correct AnswerverifiedShow Answer

If the following all crystallize in the same type of structure, which has the lowest lattice energy?

Correct AnswerverifiedShow Answer

All the following are polar except

Correct AnswerverifiedShow Answer

The molecule cis-dichloroethene is nonpolar.

Correct AnswerverifiedFalse

For the Lewis structure of the cyanamide ion that contains two double bonds, N=C=NH-,The hybrid orbitals used by the underlined nitrogen atom and the carbon atom,Respectively,Are

Correct AnswerverifiedShow Answer

For the ground-state ion Sn4+, what type of orbital do the electrons with highest energy reside in?

Correct AnswerverifiedShow Answer

Which of the following molecules is (are) polar? (a) AsCl4+ (b) I3+ (c) I3-(d) N3-(e) S32-

Correct AnswerverifiedShow Answer

What is the ground-state electron configuration of O2-?

Correct AnswerverifiedShow Answer

If 346 kJ.mol-1 is released in the reaction Na(g)+ Cl(g) →\rightarrow→ Na+Cl-(g), is the energy change for the reaction Na+Cl-(g) →\rightarrow→ NaCl(s) endothermic or exothermic?

Correct AnswerverifiedShow Answer

What is the shape of IF4+?

Correct AnswerverifiedShow Answer

Which of the following is polar?

Correct AnswerverifiedC

The hybrid orbitals used by the underlined atoms in CH3CHCHCN, from left to right, Respectively,Are

Correct AnswerverifiedShow Answer

What is the shape of BrO4-?

Correct AnswerverifiedA

Which of the following is a p-type semiconductor?

Correct AnswerverifiedShow Answer

What is the approximate NNC bond angle in azidocarbonamide, H₂NC(O) NNC(O) NH₂?

Correct Answer
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Which of the following has bond angles of 120^$\circ$?

Correct Answer
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What are the electron arrangements and the shape around the central atom of SeCl₄?

Correct Answer
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The electronegativity of an element can be expressed as ½(I + E_a) where I is the ionization energy and E_a is the electron affinity.

Correct Answer
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Which of the following has bond angles of 180^$\circ$?

Correct Answer
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How many lone pairs of electrons are found in the Lewis structure of hydrazine, H₂NNH₂?

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False

For the Lewis structure of the cyanamide ion that contains two double bonds, N=C=NH^-,The hybrid orbitals used by the underlined nitrogen atom and the carbon atom,Respectively,Are

Correct Answer
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For the ground-state ion Sn⁴⁺, what type of orbital do the electrons with highest energy reside in?

Correct Answer
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Which of the following molecules is (are) polar? (a) AsCl₄⁺ (b) I₃⁺ (c) I₃^-(d) N₃^-(e) S₃²^-

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What is the ground-state electron configuration of O₂^-?

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If 346 kJ.mol^-¹ is released in the reaction Na(g)+ Cl(g) $\rightarrow$ Na⁺Cl^-(g), is the energy change for the reaction Na⁺Cl^-(g) $\rightarrow$ NaCl(s) endothermic or exothermic?

Correct Answer
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What is the shape of IF₄⁺?

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C

The hybrid orbitals used by the underlined atoms in CH₃CHCHCN, from left to right, Respectively,Are

Correct Answer
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What is the shape of BrO₄^-?

Correct Answer
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A

Correct Answer
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