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Answer:
1: At temperatures below 542.55 K
2: At temperatures above 660 K
Explanation:
Hello there!
In this case, according to the thermodynamic definition of the Gibbs free energy, it is possible to write the following expression:

Whereas ΔG=0 for the spontaneous transition. In such a way, we proceed as follows:
1:

It means that at temperatures lower than 542.55 K the reaction will be spontaneous.
2:

It means that at temperatures higher than 660 K the reaction will be spontaneous.
Best regards!
Using hydrogen and Lindlar catalyst the triple bond will be hydrogenated to a double one with a cis conformation.
Aluminum! hope this helps
Answer:
Option A is definitely the correct answer.
Explanation:
from my analysis
( Just fill those words into each dash or empty space accordingly as you saw it )
Good luck