How to find which tab is eating too much memory in chrome

Right click the menu bar and select Task manager or press SHIFT + ESC to open the task manger of the Google chrome 

It will show

Each opened tabs and monitors them for suspicious activity. Close this process if you want to force everything in the browser to end.

Each tabs and apps listed represents a renderer process. Close the tab if you know that takes unwanted memory.

Each plug-in, will be listed. Common types of plug-ins include Flash, Quicktime, and Adobe Reader. Close a plug-in if you think it’s causing a page to perform slowly.

Each extension that is running in the browser background will be listed, If you want to stop you Click End Process.