Justice S P Garg heard the CBI and Karti's lawyer and reserved his decision.
The CBI opposed the bail plea saying that tampering of evidence and influencing witnesses in the case was a possibility.
Karti Chidambaram has challenged the special trial judge order refusing to grant him bail.
Get the latest election news, live updates and election schedule for Lok Sabha Elections 2019 on ndtv.com/elections. Like us on Facebook or follow us on Twitter and Instagram for updates from each of the 543 parliamentary seats for the 2019 Indian general elections.