Jharkhand Mukti Morcha chief Shibu Soren was on Wednesday sworn in as Jharkhand chief minister.Governor Syed Sibte Razi administered the oath of office to Soren at a ceremony in the Raj Bhavan, in Ranchi in the afternoon.Soren's party had staked claim to forming the government on Monday, two days after Madhu Koda stepped down as chief minister.