Question 1

Which of the following is polar?

Accepted Answer

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

Question 2

What is the shape of BrO4-?

Accepted Answer

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

Question 3

The molecule cis-dichloroethene is nonpolar.

Accepted Answer

A) True 
 B)False  False

Question 4

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

Question 5

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

Accepted Answer

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

Question 6

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 7

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

Accepted Answer

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

Question 8

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 9

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 10

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 11

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

The answer of If 346 kJ.mol^-¹ is released in the...

Question 12

What is the shape of IF4+?

Accepted Answer

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

Question 13

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 14

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 15

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 16

All the following are polar except

Accepted Answer

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

Question 17

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

Accepted Answer

The answer of What is the ground-state electron configuration of...

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

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 20

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

Exam 2: Molecules

Which of the following is polar?

What is the shape of BrO₄^-?

The molecule cis-dichloroethene is nonpolar.

Which of the following is a p-type semiconductor?

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

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

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

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.

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

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

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?

What is the shape of IF₄⁺?

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

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

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

All the following are polar except

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

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

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

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

Exam 2: Molecules

Which of the following is polar?

What is the shape of BrO4-?

The molecule cis-dichloroethene is nonpolar.

Which of the following is a p-type semiconductor?

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

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

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

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

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

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

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?

What is the shape of IF4+?

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

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

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

All the following are polar except

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

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

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

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

What is the shape of BrO₄^-?

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

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

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.

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

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

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?

What is the shape of IF₄⁺?

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

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

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

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

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

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