whatis nodal plane ?

You can get the definition of nodal planes easily by using Google...

Nodal plane - Google Search (http://www.google.com/search?client=gmail&rls=gm&q=Nodal%20plane)


where nodal plane in pie bond of ethene is located?

I think that knowing what the nodal plane is will help you answer your question.

Still got some doubts?

No doubt thanku