I gave my 2 week notice to manager 1 week ago. No response from mngt. I have found out through another employee during her evaluation that they were asking her if she knew where and why I was leaving and other information about me. Isn't this against the law??

It may not be very professional, but it's not against the law.

Nope, there is no law against asking either you or other employees. Why would you think there would be?

Now they can't compel you or another employee to answer the question, but nothing illegal about asking.

I would also agree with J_9 that it may not be very professional. However, depending on your position in the company, it may be a matter of interest. For example if you are in a sales position and are going to a competitor, they may want to protect themselves from you poaching customers.

Where you are going and why might simply be curiosity, and you are your fellow employees are free to refuse to answer.
But what were the other questions about you?

Is there any chance that they might wish you would stay? Many companies don't give raises unless asked, or they drag them out as far as they can. (And a recent study showed that men ask for raises many times more often than women do... possibly a reason why women still lag in wages and salaries.)

There is also a review of managers, don't forget, and a manager who loses a high number of employees can get fired or demoted, or at least not get a raise. So if your manager is losing a lot of you, that may be a reason to ask why you are leaving. If wanting a raise or not liking the manager are reasons for you, say so!