Giving one's assets to one's wife

Q: This is a matter related to gifts and inheritance. I am married, with no children. I have adult brothers and sisters. I have decided to give with immediate effect all may assets, wealth, future earnings, including the pension I am accruing at work, to my wife. She will be the sole owner and final decision-maker. Of course, she may consult me if she wishes to and I may express as an opinion, but ultimately she will take the decision. However, the assets etc will remain in my name under secular law because of the huge legal and financial implications in transferring ownership. But my intention is clear: I want to give everything to my wife now, and I will see her as the owner and write a document to this effect and respect her right to take decisions. Will such a transfer of ownership be valid or invalid in shariah? I will appreciate your guidance.

Interest Transactions

Q: Are any of the following Interest Transactions?

  1. If a person says "Buy this item for me when you go to the supermarket, it costs R40,but I will give you R50 tomorrow?
  2. Loan me R40, I will give you R50 tomorrow, the extra R10 is a gift?
  3. A person gives me R50 and says "Go buy this item for me, it costs R40 and you can keep the change?
  4. If the person insists on giving the extra amount even when I tell him that it is Interest, what should I do with that money?