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Exercise: Stability of benzene

Exercise

Benzene is a remarkably ...

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

... instable compound.

No, sorry.

... coloured compound.

Sorry, that is wrong.

... stable compound.

Correct!

... labile compound.

Sorry, that is not correct.

... disturbed compound.

No, sorry.

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Exercise

The hydrogenation enthalpy of benzene (formally cyclohexatriene) may be expected to be about -57.2 kcal/mol - 28.6 kcal/mol = -85.8 kcal/mol. However, the hydrogenation enthalpy of benzene amounts to only -49.8 kcal/mol. The difference of 36.0 kcal/mol is called ...

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

... appreciation energy.

Sorry, that is wrong.

... activation energy.

Sorry, that is not correct.

... reaction energy.

No, sorry.

... resonance energy.

Correct!

... resonance entropy.

Sorry, that is wrong.

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Exercise

Carbon-carbon single bonds between the double bonds of non-aromatic, conjugated dienes have a length of ...

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

... 1.27 Å.

No, sorry

... 1.47 Å.

Correct!

... 1.67 Å.

Sorry, that is wrong.

... 1.87 Å.

Sorry, that is not correct.

... 1.97 Å.

No, sorry.

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Exercise

Carbon-carbon double bonds are ...

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Please make a choice.

correct

wrong

partly correct

This is the right answer

... 1.23 Å long.

No, sorry.

... 1.33 Å long.

That is correct!

... 1.43 Å long.

No, that is not correct.

... 1.53 Å long.

No, sorry.

... 1.63 Å long.

Sorry, that is wrong.

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Exercise

All carbon-carbon bonds in the benzene ring have a length of ...

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Please make a choice.

correct

wrong

partly correct

This is the right answer

... 1.19 Å.

No, sorry.

... 1.29 Å.

Sorry, that is wrong.

... 1.39 Å.

Correct!

... 1.49 Å.

No, sorry.

... 1.59 Å.

Sorry, that not correct.

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