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Which hydrogen would be abstracted first when mono-brominating with Br2 and light? Which hydrogen would be abstracted first when mono-brominating with Br<sub>2</sub> and light? A) Ha B) Hb C) Hc D) Hd E) He


A) Ha
B) Hb
C) Hc
D) Hd
E) He

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Hydrogen atom abstraction from which position would yield the most stable free radical intermediate during the reaction of bromine with 2,2,3-trimethylpentane?


A) C1
B) C2
C) C3
D) C4
E) C5

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In a chain-terminating step,radicals are ______________.

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Briefly,but clearly,explain the following observation: While alkanes can be fluorinated,chlorinated and brominated easily,they do not easily undergo iodination.

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The energy of activation for the first p...

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Which hydrogen would be abstracted first when mono-brominating with Br2 and light? Which hydrogen would be abstracted first when mono-brominating with Br<sub>2</sub> and light? A) Ha B) Hb C) Hc D) Hd E) He


A) Ha
B) Hb
C) Hc
D) Hd
E) He

Correct Answer

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Which of the following reactions would have an activation energy equal to zero?


A) CH3-CH3 -- →\rightarrow 2CH3·
B) H· + CH3CH3 -- →\rightarrow CH3CH3 + H·
C) 2CH3CH2· -- →\rightarrow CH3CH2CH2CH3
D) CH3· + CH3CH3 -- →\rightarrow CH3CH3 + CH3·
E) None of the above

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Complete the following reaction sequence: indicate regiochemical/stereochemical details as relevant. Complete the following reaction sequence: indicate regiochemical/stereochemical details as relevant.

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What is the product for the following three-step reaction sequence? What is the product for the following three-step reaction sequence? A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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In a chain-initiating step,radicals are _____________.

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Complete the following reaction sequence: indicate regiochemical/stereochemical details as relevant. Complete the following reaction sequence: indicate regiochemical/stereochemical details as relevant.

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Free radical chlorination of hexane produces this number of monochloro derivatives (including stereoisomers) :


A) 3
B) 4
C) 5
D) 7
E) 8

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The bond dissociation energies for the relevant bonds are given below each of the species involved in the following reaction.Calculate the overall Δ\Delta H° for the reaction. The bond dissociation energies for the relevant bonds are given below each of the species involved in the following reaction.Calculate the overall \Delta H° for the reaction. A) +616 kJ / mol B) -101 kJ / mol C) -173 kJ / mol D) +57 kJ kJ / mol E) -44 kJ / mol


A) +616 kJ / mol
B) -101 kJ / mol
C) -173 kJ / mol
D) +57 kJ kJ / mol
E) -44 kJ / mol

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Which of the reactions listed below would be exothermic?


A) CH3-CH3 →\rightarrow 2CH3·
B) CH3· + CH4 →\rightarrow CH4 + CH3·
C) 2(CH3) 2CH· →\rightarrow (CH3) 2CH-CH(CH3) 2
D) H· + (CH3) 3CH →\rightarrow (CH3) 3CH + H·
E) None of the above

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Mono-bromination of the following alkane, Mono-bromination of the following alkane, , (using Br<sub>2</sub> with light) would be? A) I B) II C) III D) IV E) V , (using Br2 with light) would be? Mono-bromination of the following alkane, , (using Br<sub>2</sub> with light) would be? A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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In the presence of light at 25°C,isobutane (1 mol) and bromine (1 mol) yield which monobromo product(s) ?


A) 2-Methyl-1-bromopropane (almost exclusively)
B) 2-Methyl-2-bromopropane (almost exclusively)
C) A mixture of 50% (A) and 50% (B)
D) A mixture of 90% (A) and 10% (B)
E) Butyl bromide

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For which of the following gas-phase reactions would the Eact be equal to Δ\Delta H°?


A) Cl-Cl →\rightarrow 2Cl·
B) 2 Cl· →\rightarrow Cl-Cl
C) Cl· + CH4 →\rightarrow CH3· + H-Cl
D) CH3· + CH3· →\rightarrow CH3-CH3
E) CH3· + Cl-Cl →\rightarrow CH3-Cl + Cl·

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The bond dissociation energies for the relevant bonds are given below each of the species involved in the following reaction.Calculate the overall Δ\Delta H° for the reaction. The bond dissociation energies for the relevant bonds are given below each of the species involved in the following reaction.Calculate the overall \Delta H° for the reaction. A) +437 kJ / mol B) -437 kJ / mol C) -411 kJ / mol D) +26 kJ / mol E) -1581 kJ / mol<sup> </sup>


A) +437 kJ / mol
B) -437 kJ / mol
C) -411 kJ / mol
D) +26 kJ / mol
E) -1581 kJ / mol

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What product(s)might be obtained via chain-termination step(s)during the reaction of 2-methylpropene with HBr in presence of peroxides?

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The addition of HBr to 2-methylpropene t...

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Which hydrogen would be abstracted first when mono-brominating with Br2 and light? Which hydrogen would be abstracted first when mono-brominating with Br<sub>2</sub> and light? A) Ha B) Hb C) Hc D) Hd E) He


A) Ha
B) Hb
C) Hc
D) Hd
E) He

Correct Answer

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What is the product for the following three-step reaction sequence? What is the product for the following three-step reaction sequence? A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

Correct Answer

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Showing 21 - 40 of 114

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