# Exercise 1

Exercise

Fig.1

Which reaction type is shown in the illustration?

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

 Elimination of $X2$ from dihalogenoalkynes No, sorry Addition of $X2$ to alkynes That is correct! Addition of $X2$ to alkenes Sorry, that is wrong Elimination of $X2$ from dihalogenoalkenes Sorry, that is wrong Substitution of $X2$ at alkynes No, sorry
Exercise

Fig.2

Which reaction type does the illustration show?

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

 Selective stereohalogenation of alkynes Sorry, that is wrong Selective monoiodation of alkynes No, sorry Selective stereohalogenation of alkenes Sorry, that is wrong Selective dihalogenation of alkynes No Selective monohalogenation of alkynes Correct!
Exercise

In electrophilic addition reactions, for example with bromine or chlorine, alkenes are ...

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

 ... more reactive than alkynes That is correct! ... more active than alkynes No ... less reactive than alkynes Sorry, that s wrong ... completely inactive Sorry, that is wrong ... immune No, sorry
Exercise

The carbon-carbon triple bond of an alkyne is considerably richer in electrons than the double bond of a dibromoalkene. Therefore, ...

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

 ... a halogen more easily attacks a dibromoalkene Sorry, that is wrong ... a halogen is more easily added to an alkane No, sorry ... a halogen more easily attacks an alcohol Sorry, that is wrong ... a halogen is more easily added to an alkyne That is correct! ... a halogen more easily attacks an aldehyde Sorry, that is wrong