Chemical Reaction Engineering
In which of the following gaseous phase reversible reactions, the product yield can not be increased by the application of high pressure?

2SO₂ + O₂ ⇋ 2SO₃
PCl3 + Cl₂ ⇋ PCl5
N₂ + O₂ ⇋ 2NO
N + 3H₂ ⇋ 2NH₃

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Chemical Reaction Engineering
The experimentally determined overall order of the reaction, A + B → C + D, is two. Then the

Reaction may be elementary with molecularity of 2
Reaction is elementary with a molecularity of 2
Molecularity of the reaction is 2, but the reaction may not be elementary
Reaction is elementary but the molecularity may not be 2

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