For the rest of 2014 The first Minute of call from google hangout is free

With Google hangout first minute of your call will be free ,this is applicable for 25 countries,and India is one of them
Get get your free minutes just add some credits to your hangout account
Links:-
Hangout dialer -https://play.google.com/store/apps/details?id=com.google.android.apps.hangoutsdialer
Hangout app-https://play.google.com/store/apps/details?id=com.google.android.talk&

Calls where the first
minute are free(25 countries) will say, “First
minute free” on the call screen. If
you don’t see this message, you’ll
be charged for the first minute.

Reference:-https://support.google.com/hangouts/answer/6079055