Question 1

Predict the products for the following set of reactants. Li(s)  + CH3Cl(g)  

Accepted Answer

A)   CH3CH3(g)  + LiCl(s) 
B)   CH4(g)  + LiCl(s) 
C)   CH3Li(s)  + LiCl(s) 
D)   CH3Li(s)  + Cl2(g) 
E)   CH2Li(s)  + HCl(g) F) A) and D)
G) B) and E)

Question 2

Which of the following hydroxides will be the most basic?

Accepted Answer

A)   B(OH) 3
B)   Al(OH) 3
C)   Ga(OH) 3
D)   In(OH) 3
E)   TlOHF) A) and C)
G) A) and B)

Question 3

Predict the products for the following set of reactants. Ca3As2(s)  + H2O(l)  

Accepted Answer

A)   As3+(aq)  + Ca(OH) 2(aq) 
B)   As(OH) 3(s)  + Ca2+(aq)  + H2(g) 
C)   As(OH) 3(s)  + Ca(OH) 2(aq) 
D)   AsH3(g)  + Ca(OH) 2(aq) 
E)   CaH2(aq)  + As2O3(aq) F) A) and E)
G) B) and E)

Question 4

The elements from Groups 1A(1)  and 2A(2)  are

Accepted Answer

A)   strong acids.
B)   strong bases.
C)   amphoteric.
D)   strong oxidizing agents.
E)   strong reducing agents.F) B) and D)
G) All of the above

Question 5

Name the three different classes (types) of hydride, and list some of their important characteristics.

Accepted Answer

1. Ionic hydrides form with metals from ...

Question 6

Which of the following elements exists in allotropic forms?

Accepted Answer

A)   silicon
B)   germanium
C)   tin
D)   lead
E)   xenonF) A) and E)
G) B) and E)

Question 7

Which of the alkali metals has the highest melting point?

Accepted Answer

A)   Li
B)   Na
C)   K
D)   Rb
E)   CsF) A) and B)
G) A) and C)

Question 8

Write balanced equations, showing all reactants and products, to represent
a. roasting of limestone (CaCO3) to give lime.
b. tetraphosphorus decaoxide (P4O10) reacting with water to produce phosphoric acid.

Accepted Answer

a. CaCO₃(s) ...

Question 9

Which element forms compounds which are used to treat individuals suffering from manic-depressive disorders?

Accepted Answer

A)   fluorine
B)   lithium
C)   boron
D)   beryllium
E)   arsenicF) B) and D)
G) B) and C)

Question 10

Which of the following statements about the effective nuclear charge, Zeff, is correct?

Accepted Answer

A)   Zeff increases with the size of the atom.
B)   Zeff decreases across a period and increases down a group.
C)   Zeff increases across a period and is relatively constant down a group.
D)   Zeff increases as the value of the principal quantum number increases.
E)   Zeff is greater for hydrogen than for any other element.F) B) and C)
G) B) and E)

Question 11

Which of the following oxides will give the most acidic solution when dissolved in water?

Accepted Answer

A)   MgO
B)   Al2O3
C)   Cl2O
D)   SrO
E)   H2O2F) C) and D)
G) A) and B)

Question 12

Unlike the remainder of the Group 1A(1)  elements, lithium forms many salts that have some covalent bond character. What is a reason for this behavior?

Accepted Answer

A)   The high first ionization energy of lithium makes sharing the electron easier than transferring it.
B)   The high charge density on the lithium cation deforms nearby polarizable electron clouds.
C)   The atomic radius of lithium enables it to share its valence electron effectively.
D)   Since lithium has only 1 electron in its 2s orbital, it can accept an electron from another element.
E)   Lithium's electronegativity is more like that of a non-metal than a metal.F) A) and D)
G) D) and E)

Question 13

Sodium tripolyphosphate is useful

Accepted Answer

A)   as a starting material in the synthesis of organic phosphorus compounds.
B)   as a water-softening agent.
C)   as an emulsifier in making of processed cheese.
D)   as a radiator corrosion inhibitor.
E)   as a fertilizer.F) D) and E)
G) A) and B)

Question 14

Xenon forms several compounds with oxygen and fluorine. It is the most reactive non-radioactive noble gas because

Accepted Answer

A)   its large radius allows oxygen and fluorine to bond without being crowded.
B)   it has the highest electronegativity of these noble gases.
C)   it has the highest electron affinity of these noble gases.
D)   its effective nuclear charge is lower than the other noble gases.
E)   it has the lowest ionization energy of these noble gases.F) A) and B)
G) C) and D)

Question 15

According to the phase diagram of carbon, what pressure and temperature conditions, if any, are needed in order for diamond to be the stable phase?

Accepted Answer

A)   low pressure, low temperature
B)   low pressure, high temperature
C)   high pressure, low temperature
D)   high pressure, high temperature
E)   Actually, diamond is not stable under any conditions.F) A) and E)
G) C) and D)

Question 16

Silicon halides have stronger bonds than corresponding carbon halides. Which of the following is a possible explanation of this phenomenon?

Accepted Answer

A)   The larger silicon atoms permit better overlap of its atomic orbitals with those of the halogens than the smaller carbons atoms do.
B)   The large electronegativity difference between silicon and the halogens makes their bonds stronger than those of carbon.
C)   Silicon has the ability to form a partial double bond with a halogen through the overlap of its d-orbital with a p-orbital of the halogen.
D)   Silicon has a larger effective nuclear charge than carbon which allows it to bond more strongly to the more negative halogens than carbon.
E)   Carbon-halogen bonds are unusually weak.F) B) and E)
G) B) and C)

Question 17

Predict the products for the following set of reactants. H2O(l)  + ClF5(l)  

Accepted Answer

A)   HClO2(aq)  + HF(aq) 
B)   HClO3(aq)  + HF(aq) 
C)   HClO(aq)  + HF(aq) 
D)   HCl(aq)  + HF(aq) 
E)   HClO(aq)  + HFO(aq) F) A) and B)
G) None of the above

Question 18

Which of the following has the most allotropes?

Accepted Answer

A)   carbon
B)   sulfur
C)   oxygen
D)   selenium
E)   nitrogenF) B) and D)
G) B) and C)

Question 19

Oxides of group 1A (1) and 2A (2) elements are strongly acidic.

Accepted Answer

A) True 
 B)False

Question 20

What is the highest oxidation state of chlorine in any of its compounds?

Accepted Answer

A)   -1
B)   0
C)   +1
D)   +3
E)   +7F) A) and D)
G) A) and C)

Exam 14: Periodic Patterns in the Main Group Elements: Bonding, Structure, and Reactivity

Silicon halides have stronger bonds than corresponding carbon halides. Which of the following is a possible explanation of this phenomenon?

Correct AnswerverifiedShow Answer

Unlike the remainder of the Group 1A(1) elements, lithium forms many salts that have some covalent bond character. What is a reason for this behavior?

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Which of the alkali metals has the highest melting point?

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Oxides of group 1A (1) and 2A (2) elements are strongly acidic.

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Which of the following oxides will give the most acidic solution when dissolved in water?

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Which of the following elements exists in allotropic forms?

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According to the phase diagram of carbon, what pressure and temperature conditions, if any, are needed in order for diamond to be the stable phase?

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The elements from Groups 1A(1) and 2A(2) are

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Which element forms compounds which are used to treat individuals suffering from manic-depressive disorders?

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Name the three different classes (types) of hydride, and list some of their important characteristics.

Correct Answerverified1. Ionic hydrides form with metals from ...View AnswerShow Answer

What is the highest oxidation state of chlorine in any of its compounds?

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Predict the products for the following set of reactants. Li(s) + CH3Cl(g) 

Correct AnswerverifiedShow Answer

Xenon forms several compounds with oxygen and fluorine. It is the most reactive non-radioactive noble gas because

Correct AnswerverifiedShow Answer

Which of the following has the most allotropes?

Correct AnswerverifiedShow Answer

Predict the products for the following set of reactants. Ca3As2(s) + H2O(l) 

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Which of the following statements about the effective nuclear charge, Zeff, is correct?

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Which of the following hydroxides will be the most basic?

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Predict the products for the following set of reactants. H2O(l) + ClF5(l) 

Correct AnswerverifiedShow Answer

Sodium tripolyphosphate is useful

Correct AnswerverifiedShow Answer

Write balanced equations, showing all reactants and products, to represent a. roasting of limestone (CaCO3) to give lime. b. tetraphosphorus decaoxide (P4O10) reacting with water to produce phosphoric acid.

Correct Answerverifieda. CaCO3(s) ...View AnswerShow Answer

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1. Ionic hydrides form with metals from ...
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Predict the products for the following set of reactants. Li(s) + CH₃Cl(g) 

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Predict the products for the following set of reactants. Ca₃As₂(s) + H₂O(l) 

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Which of the following statements about the effective nuclear charge, Z_eff, is correct?

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Predict the products for the following set of reactants. H₂O(l) + ClF₅(l) 

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Write balanced equations, showing all reactants and products, to represent a. roasting of limestone (CaCO₃) to give lime. b. tetraphosphorus decaoxide (P₄O₁₀) reacting with water to produce phosphoric acid.

Correct Answer
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a. CaCO₃(s) ...
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