Does IPC apply to Jammu and Kashmir?

Yes, IPC applies to Jammu and Kashmir. In 2019, the Centre scrapped the special status granted to Jammu and Kashmir under Article 370 of the Constitution, thereby making the Indian Penal Code (IPC) applicable in the UT of Jammu and Kashmir. 

Further Reading:

• The Indian Penal Code (IPC)
• Indian Polity Notes For UPSC