Project ForgeChemical Technology
Organic Chemical Industries
GATE 2016
Medium
Two paper pulp plants P and Q use bamboo as raw material. Plant P's digester uses NaOH and Na2S (not NaHCO3/Na2SO3); Plant Q's digester uses Na2CO3/NaHCO3/Na2SO3 (not NaOH/Na2S). Which statement is CORRECT?
- APlant P and Plant Q both use the Sulfite process
- BPlant P and Plant Q both use the Kraft process
- CPlant P uses Sulfite process
- Plant P uses Kraft process
Explanation
NaOH and Na2S are the defining Kraft-process (sulfate process) digester chemicals; Plant P uses Kraft. Plant Q's NaHCO3/Na2SO3 chemistry matches the sulfite process.
Source: GATE CH 2016 (2016)
This question is part of a 15-day revision cycle — sign in and Project Forge will bring it back the day before you'd forget it.