Dear Philanthropist,
Professional ethics is related to the moral issues which arise on account of specialized know how which professionals attain, and how the use of this knowledge should be governed when providing a service to the public. More on lines of code of conduct. Like Lawyers are supposed or obliged to maintain confidentiality in clients’ case, whereas personally he might know other facts too. But his professional ethics guide him to diligently follow his code of professional ethics and seek justice.
Business ethics or Corporate Ethicsis a form of applied ethics that examines ethical principles and moral or ethical problems that arise in a business environment.Like international business ethics, ethics of production
Whereas General Ethics are set of moral code or conduct like righteousness etc.
The above mentioned points of differentiation are according to my knowledge
Hope this piece of information helps you:)
Best Wishes,