The pressure of a 1:4 mixture of dihydrogen and dioxygen enclosed in a vessel is one atmosphere. What would be the partial pressure of dioxygen?

(i) 0.8 × 10 5 atm 

(ii) 0.008 Nm-2 

(iii) 8 ×104  Nm-2 

(iv) 0.25 atm 

0 4 Views | Posted 4 months ago
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    Answered by

    Payal Gupta | Contributor-Level 10

    4 months ago

    This is a multiple choice answer as classified in NCERT Exemplar

    option (iii) 8 × 104  Nm-2 

    Partial pressure of oxygen, Po2= Xo2   × Ptotal

    Mole fraction of O2= M o l e o f o x y g e n M o l e s o f o x y g e n + M o l e s o f h y d r o g e n

    = 4 4 + 1 = 4 5

    Po2= 4 5 × 1 = 4 5  (?Ptotal = 1 atm)

    1 atm =  1.1034 × 105 Nm-2 or Pa

    Partial pressure of dioxygen = 0.8 ×105 = 8×10Nm-2 

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