Commerce and Industry Minister Sitharaman (BJP), who was elected to Rajya Sabha from Andhra Pradesh, took oath in English while I&B and Environment Minister Javedkar, who was elected from Madhya Pradesh, took oath in Hindi.
Gulam Rasool Balyawi and Pawan Kumar Verma (both JD-U), who were elected to Rajya Sabha from Bihar recently, also took.
From Karnataka, MV Rajeev Gowda and B K Hariprasad (both Cong) took oath while Anubhab Mohanty and Bhupinder Singh (BJD) from Odisha also took oath as also SP's Vishambhar Prasad Nishad (Uttar Pradesh).
After the oath, the House mourned the death of its former member Shanti G Patel.
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Ansari said Patel, a doctor by profession, passed away on June 13, 2014 at the age of 14 years.
Patel, who was Mayor of Mumbai during 1970-71, represented the state of Maharashtra in the Upper House from July 1980 to July 1986.
"In passing away of Patel, the country has lost a veteran freedom fighter, an able parliamentarian, a noted trade unionist and a dedicated social worker," Ansari said.
The House also lauded PSLV-23 successfully launching 5 satelites of France, Germany, Canada and Singapore on June 30.