Question 1

All the following are polar except

Accepted Answer

A)   XeO2. 
B)   ClF3. 
C)   XeF4. 
D)   SOCl2. 
E)   XeO3.

Question 2

What is the shape of ClF3?

Accepted Answer

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

Question 3

For the ground-state ion I-1, what type of orbital do the electrons with highest energy reside in?

Accepted Answer

A)   4d
B)   6s
C)   5p
D)   5d
E)   5s

Question 4

The NCO bond angle in formamide,H2NCHO,is __________.

Accepted Answer

~ 120<sup>...

Question 5

Predict the HNH bond angle in NH2-.

Accepted Answer

Question 6

Because of the octet rule,the gaseous O2- ion is stable.

Accepted Answer

A) True 
 B)False

Question 7

All the following have an angular shape except

Accepted Answer

A)   N3-.
B)   ClO2-.
C)   S32-.
D)   HOCl.
E)   NH2-.

Question 8

Germanium is a semiconductor .Which of the following should be added in small amounts to produce a p-type semiconductor?

Accepted Answer

A)   Bi
B)   As
C)   P
D)   Sb
E)   B

Question 9

All the following elements exist as diatomic gases at room temperature and atmospheric pressure except

Accepted Answer

A)   H.
B)   Ar.
C)   N.
D)   Cl.
E)   O.

Question 10

Which of the following is a radical?

Accepted Answer

A)   BrO
B)   CH3+
C)   CH3-
D)   BF4-

Question 11

How many lone pairs of electrons are found in the Lewis structure of urea, (NH2) 2CO?

Accepted Answer

A)   2
B)   3
C)   6
D)   4
E)   8

Question 12

Which of the following has the lowest lattice energy?

Accepted Answer

A)   KCl
B)   LiCl
C)   KBr
D)   NaCl
E)   KI

Question 13

Draw the Lewis structure of the formate ion and indicate whether resonance forms are possible.

Accepted Answer

Two resona...

Question 14

In the most plausible Lewis structure of XeOF2, there are

Accepted Answer

A)   2 single bonds, 1 double bond, and 1 lone pair of electrons around Xe.
B)   3 single bonds and 1 lone pair of electrons around Xe.
C)   2 single bonds, 1 double bond, and 3 lone pairs of electrons around Xe.
D)   2 single bonds, 1 double bond, and 2 lone pairs of electrons around Xe.
E)   3 single bonds and 2 lone pairs of electrons around Xe.

Question 15

What hybrid orbitals are used by the N atoms in urea, H2NCONH2?

Accepted Answer

A)   sp
B)   sp2
C)   sp3
D)   dsp3

Question 16

How many electrons are in the expanded valence in XeO4?

Accepted Answer

Question 17

What is the electronic configuration of Ag?

Accepted Answer

1s² 2s² 2p⁶ 3...

Question 18

Which of the following species are radicals?
A) CO2
B) HNO3
C) NO2
D) NO-
E) HNO3

Accepted Answer

Question 19

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

Accepted Answer

A)   NO3-
B)   HO2-
C)   NO2-
D)   CS32-
E)   I3+

Question 20

If 491kJ.mol-1 is released in the reaction Na+(g)+Cl-(g)$\rarr$Na+Cl-(g), what is the energy change for the reaction Na(g)+ Cl(g)$\rarr$Na+Cl-(g)? (Hint: See the discussion in the text and apply Hess's Law.)

Accepted Answer

Exam 2: Molecules

How many lone pairs of electrons are found in the Lewis structure of urea, (NH2) 2CO?

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Which of the following has the lowest lattice energy?

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What is the electronic configuration of Ag?

Correct Answerverified1s2 2s2 2p6 3...View AnswerShow Answer

All the following have an angular shape except

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What hybrid orbitals are used by the N atoms in urea, H2NCONH2?

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If 491kJ.mol-1 is released in the reaction Na+(g)+Cl-(g) →\rarr→ Na+Cl-(g), what is the energy change for the reaction Na(g)+ Cl(g) →\rarr→ Na+Cl-(g)? (Hint: See the discussion in the text and apply Hess's Law.)

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

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What is the shape of ClF3?

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Draw the Lewis structure of the formate ion and indicate whether resonance forms are possible.

Correct AnswerverifiedTwo resona...View AnswerShow Answer

In the most plausible Lewis structure of XeOF2, there are

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All the following are polar except

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Predict the HNH bond angle in NH2-.

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Which of the following species are radicals? A) CO2 B) HNO3 C) NO2 D) NO- E) HNO3

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Germanium is a semiconductor .Which of the following should be added in small amounts to produce a p-type semiconductor?

Correct AnswerverifiedShow Answer

For the ground-state ion I-1, what type of orbital do the electrons with highest energy reside in?

Correct AnswerverifiedShow Answer

The NCO bond angle in formamide,H2NCHO,is __________.

Correct Answerverified~ 120...View AnswerShow Answer

Which of the following is a radical?

Correct AnswerverifiedShow Answer

Because of the octet rule,the gaseous O2- ion is stable.

Correct AnswerverifiedShow Answer

All the following elements exist as diatomic gases at room temperature and atmospheric pressure except

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How many electrons are in the expanded valence in XeO4?

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How many lone pairs of electrons are found in the Lewis structure of urea, (NH₂) ₂CO?

Correct Answer
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1s² 2s² 2p⁶ 3...
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What hybrid orbitals are used by the N atoms in urea, H₂NCONH₂?

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If 491kJ.mol^-¹ is released in the reaction Na⁺(g)+Cl^-(g) $\rarr$ Na⁺Cl^-(g), what is the energy change for the reaction Na(g)+ Cl(g) $\rarr$ Na⁺Cl^-(g)? (Hint: See the discussion in the text and apply Hess's Law.)

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

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What is the shape of ClF₃?

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Two resona...
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In the most plausible Lewis structure of XeOF₂, there are

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Predict the HNH bond angle in NH₂^-.

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Which of the following species are radicals? A) CO₂ B) HNO₃ C) NO₂ D) NO^- E) HNO₃

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For the ground-state ion I^-1, what type of orbital do the electrons with highest energy reside in?

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The NCO bond angle in formamide,H₂NCHO,is __________.

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~ 120^...
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Because of the octet rule,the gaseous O^2- ion is stable.

Correct Answer
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How many electrons are in the expanded valence in XeO₄?

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