Is the famous city Pataliputra was capital of Bihar?

No, the famous city of Pataliputra was not the capital of Bihar. Pataliputra was the capital of the Magadha Empire, one of the greatest powers of ancient India, from the 5th century BCE to the 5th century CE. Today, Pataliputra is known as the city of Patna, and it is the capital of the Indian state of Bihar.