Q. Which copper mine in Jharkhand's Singhbhum district is still operational?
Answer: Surda
Notes: Surda copper mine in Singhbhum is operational under Hindustan Copper Limited's Indian Copper Complex at Ghatsila. It has ore reserves of 26 million tonnes with 1.2% copper grade. Other mines like Rakha and Kendadih were closed in 2001 but are being revived. Singhbhum's known copper deposits include Chapri, Rakha, Surda, Kendadih, Pathargora, and Dhobani. Banalopa and Badiya are not prominently referenced in Singhbhum copper mining records.