Question 97 How does connecting a metal like iron with a wire to a metal that is

Question

Question 97 How does connecting a metal like iron with a wire to a metal that is easier to oxidize like zinc help prevent corrosion of the iron?

A.The other metal is oxidized instead and the electrons travel to the iron, keeping it from oxidizing.

B.The other metal absorbs the electrons from the iron, which keeps the iron from undergoing oxidation.

C.The wire is acting as an oxidant and keeps the two metals from undergoing other chemical reactions.

D.There is no salt-bridge, so there is no reaction between the two metals.

E.The other metal is oxidized and adsorbs all the oxidant, keeping it away from the iron.

Question 98

In a battery, if the following oxidation-reduction reactions takes place normally: What reaction would be taking place if you were charging the battery? Mn2O3 + ZnO -> 2MnO2 + Zn

A.2 MnO2 + Zn - Mn2O3 + ZnO

B.ZnO - Zn

C.Mn2O3 MnO2

D.All of these

E.None of these

Question 99

Which of the following statements is untrue about oxidation and reduction processes?

A.An oxidation can happen without a reduction.

B.It involves the exchange of electrons.

C.Often ions are generated or consumed.

D.Electrons are often involved in oxidation and reduction reactions.

E.All of these are true.

Question 100

Why does a battery that has thick zinc walls last longer than one that has thin zinc walls?

A.Thick zinc walls prevent the battery from over heating.

B.Thicker zinc walls prevent electrons from being lost into the surrounding environment.

C.Thicker zinc walls last longer at holding in the battery acid.

D.The zinc walls are transformed into zinc ions as the battery provides electricity.

Question 102

If you were throwing a party, which of these compounds would probably be on the beverage list?

CH3CH2OH

CH3CH2CH3

CH3OH

Milk, it does the body good.

Question 103

Which of the following molecules would probably be isolated closest to the top of a fractionating tower at a refinery?

C4H10

C8H18

C10H22

C20H42

C40H82

CH3CH2OH

CH3CH2CH3

CH3OH

CH3CHCH2

Milk, it does the body good.

Explanation / Answer

97) A

98) A

99) A

100) D

102) CH3CH2OH

103) C4H10

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