for 87c51fa oscillator setting, if i use a 11.0952 mhz crystal then can i set the serial port at 9600 baud rate.
Exactly (+-0%)

also for the 30 pf capacitor (used for oscillator purpose) what volt/resistor??? value should the capacitor be?
I doubt you can get less than 50V for 33pF, anything above 10V will do.

Erik