He said that having been elected to the house for the second time, he had a school-like feeling of being a senior.
"It was certainly an unusual experience," Tharoor said.
Former Nagaland chief minister Neiphiu Rio said the mood in the house was melancholic. He said the NDA has got a massive mandate and the new government will be more decisive in taking steps for the betterment of the country.
Tarun Vijay, a BJP MP in the Rajya Sabha who was in the visitors' gallery, said the members had a feeling of sadness and the mood in the house was sombre.
Vijay said he had come to witness Modi taking his seat on the treasury benches "which were filled with BJP members".
"I came to see him occupy the seat. It is a lifetime memory for me," Vijay said.
After the house observed silence in the memory of Munde and was adjourned for the day, members greeted each other with namaste, handshakes and embraces.