They do pay dividend but it is not fixed and is decided by the board of directors of trustee company which is managing the ETF.
Yes, they do pay dividend. Below is the dividend history:
Dividend - Rs 8 Per Unit18-Feb-2015
Dividend-Rs.7 Per Unit10-Mar-2014
Dividend-Rs.7.5 Per Unit13-Mar-2013
Dividend-Rs.10 Per Unit09-Mar-2012
Dividend-Rs.4.50 Per Unit08-Jul-2009