Issuing a talaaq while being forced

Q: My elder brother, recently and was forced to get divorced from his in laws. He was under so much pressure from them, and he was alone at his rented house, and they all forced him to say yes for the divorce. 

But now he is saying that he has not said from his true heart to his wife that I need the divorce from her. So please advise if the divorce is done on his wife or not, because my brother is saying that he has not given her divorce by his heart, but was under pressure from his in laws.

Using vaseline petroleum jelly

Q: Are these halaal? 

Mineral oil, Paraffin, microcrystalline wax, tocopheryl acetate, fragrance. 

They are the ingredients of vaseline petroleum jelly skin protection. I searched them and mustakshif app said its haraam. I have a little amount of this on my shirt and phone because it was on my hands. 

Giving a stray cat to someone to look after

Q: If I find any stray cat, I don't know if the cat belongs to anyone. There is no belt or collar or anything. I tried to look if anybody is searching for his cat. 

If it seems that nobody is claiming it or somebody has intentionally left it, can I take it and give it to someone who will take care of it? The cat will not be able to get food and survive well on its own on streets.