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Exercises

Instruction

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Fig.1

Instruction

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Fig.2

Exercise

Fig.3

Which formic acid conformer does the illustration depict?

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

Anti conformer.

Correct!

Syn conformer.

No, sorry.

Cis conformer.

Sorry, that is wrong.

Trans conformer.

Sorry, that is not correct.

Contra conformer.

No!

Semi conformer.

Sorry, that is not correct!

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Exercise

Fig.4

Which formic acid conformer does the illustration depict?

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

Anti conformer.

No, sorry.

Trans conformer.

Sorry, that s wrong.

Syn conformer.

Correct!

Cis conformer.

No, sorry.

Semi conformer.

Sorry, that is not correct.

Contra conformer.

No, sorry.

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Exercise

Why are the boiling points of carboxylic acids considrably higher than that of the corresponding alcohols?

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

Carboxylic acids may form dimers in solution and liquid state of aggregation.

Correct!

Alcohols form dimers in liquid state, but carboxylic acids even form polymers when they are heated.

Sorry, that is wrong.

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Exercise

Which of the following statements is correct?

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

Formic acid's anti is 12 kcal/mol more stable than the syn conformer.

No, sorry.

Formic acid's syn is 6 kcal/mol more stable than the anti conformer.

That is correct!

Formic acid's syn is 24 kcal/mol more stable than the anti conformer.

Sorry, that is wrong.

The syn and anti conformers of formic acid are energetically equivalent.

Sorry, that is not correct.

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