ranjeetray:
Thanks for your kind reply. But this Link doesn't say anything about the I2C address of Arduino Board and method to modify the I2C address.
From the page link...
Description
Initiate the Wire library and join the I2C bus as a master or slave. This should normally be called only once.
Parameters
address: the 7-bit slave address (optional); if not specified, join the bus as a master.