Question

The Molecularity of the reaction P2O5 ----> P2O3+ O2 is

1) zero
2) 1
3) 2
4) 3​

Answer 1

Answer:

This is an oxidation-reduction (redox) reaction:

2 PIII - 4 e- → 2 PV

(oxidation)

2 O0 + 4 e- → 2 O-II

(reduction)

P2O3 is a reducing agent, O2 is an oxidizing agent.

Reactants:

P2O3

Names: Phosphorus trioxide source: wikipedia, accessed: 2019-09-27, Phosphorus(III) oxide source: wikipedia, accessed: 2019-09-27, Phosphorus sesquioxide source: wikipedia, accessed: 2019-09-27

Appearance: Colourless monoclinic crystals or liquid source: wikipedia, accessed: 2019-09-27

O2

Names: Dioxygen source: wikidata, accessed: 2019-09-07, Oxygen source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-07, Oxygen (liquefied) source: ICSC, accessed: 2019-09-04

Appearance: Odourless compressed gas source: ICSC, accessed: 2019-09-04; Liquefied gas. colourless-to-blue extremely cold liquid source: ICSC, accessed: 2019-09-04

Products:

P2O5

Names: Phosphorus pentoxide source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04, Diphosphorus pentoxide source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04, Phosphorus(V) oxide source: wikipedia, accessed: 2019-09-27

Appearance: White powder | very deliquescent | odorless source: wikipedia, accessed: 2019-09-27; Hygroscopic white crystals or powder source: ICSC, accessed: 2019-09-04