Identfy the correct answer for the following:
1. The freshly prepared wine was left open for several days, and upon tasting it later, it was found to be sour in taste. What caused the wine to taste sour?
2. I am a chemical process that transforms liquid oils into solid fats by using a metal catalyst. I am commonly used to make products like margarine and shortening. Without my help, your snacks might not be as crispy or have the same texture. However, be careful if not controlled, I might create unhealthy trans fats. Who am I?