To disable Google Talk on Android
- You go to the main menu and tap on "settings".
- You're looking the "application Manager" and tap on it.
- In the "application Manager" swipe to the left until you see the top of the tab "ALL".
- Now scroll down to the entry "TALK". You tap on it.
- To disable Google Talk, tap Disable to the point "". Confirm with "OK".

Google Talk disable
Practice tip refers to the Samsung Galaxy S 2 with Android 4.1.2. Tip: How to make your Android Apps to the SD card, read here.