Hi VISHNUPRASAD,
Yes, it is possible to use FreeRTOS, IAR and the LPC1343. I would recommend you to use the freertos_blinky example project as base for your application. The example is part of the LPCOpen package for the LPCXpreso LPC1343 board, you can download it from this link:
LPCOpen Software for LPC13XX|NXP
Hope it helps!
Best Regards,
Carlos Mendoza
Technical Support Engineer