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there is no meaning in pseudo unimolecular reaction.

Explanation: molecularity of a reaction is "the no. of species(ions, molecules or atoms) which collide simultaneously to give rise a chemical change or chemical reaction.

a reaction can be called unimolecular (decomposition of ammonium nitrite to nitrogen and water) as single molecule decomposes to give rise to products

a reaction can be called bimolecular (HI decomposes to H2 and I2) as two HI molecules are colliding.

that means molecularity says about "actually how many species collide and there is nothing ambiguity (pseudo) in it.

but a reaction can be called pseudo first order reaction (hydrolysis of sucrose) as rate of reaction depends on only sucrose conc. and water solvent conc. as is in excess do not affect the rate.

if any one is having doubts in chemistry u can mail me at chemistry_krish@yahoomail.com

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Q: Define Pseudo unimolecular reaction with example?
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