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GATE Chemical 2019 | Question: 18

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In Kraft process, the essential chemical reagents used in the digester are

  1. caustic soda, mercaptans and ethylene oxide
  2. caustic soda, sodium sulphide and soda ash
  3. quick lime, salt cake and dimethyl sulphide
  4. baking soda, sodium sulphide and mercaptans

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