Answer:
False.
While there have been some cases in history where slaves were granted freedom after revolting, it was not a common occurrence. In most cases, slave revolts were met with violent repression by those in power, and the slaves involved were often punished or killed.
Even when slaves were granted freedom, it was usually not a result of a revolt, but rather the actions of abolitionists or political leaders who recognized the injustice of slavery and worked to end it through legal means.