(6) method of preparing propyne in the laboratory ​

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Identify one disadvantage to each of the following models of electron configuration: dot structures arrow and line diagrams written electron configurations type in your answer below.

Provide a stepwise curved arrow mechanism that fully explains the outcome of the reaction shown below. oh нао* heat он