Chemical Reaction Engineering
If helium is introduced in a reactor containing O₂, SO₂ and SO₃ at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO₃ (as per Le Chatlier principle)

Increases
Remains unaltered
Decreases
Changes unpredictably

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Chemical Reaction Engineering
A trickle bed reactor is the one, which

Processes three reactants at different flow rates
Processes three reactants with same flow rate
Employs all the three phases (i.e.. .solid, liquid and gas)
Has altogether three streams either entering or leaving

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