Sir/ madam can you please check the IUPAC name of the following compounds

Dear student

 Both cases have 3 carbon atoms so word root for 3 carbon atom is Prop
In case 4 , double bond is present. So it is correctly named as Prop-1-ene.

In case 5 , triple bond is present. So it is correctly named as Prop-1-yne.

Regards
 

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