A) \[1/2\]
B) \[2/3\]
C) \[\frac{1}{3}\times \frac{273}{298}\]
D) \[1/3\]
Correct Answer: D
Solution :
[d] Let the mass of methane and oxygen = m gm. Mole fraction of \[{{O}_{2}}\] = \[\frac{Moles\,of\,{{O}_{2}}}{Moles\,of\,{{O}_{2}}+Moles\,of\,C{{H}_{4}}}\] \[=\frac{m/32~~~~~}{m/32+m/16}=\frac{m/32}{3m/32}=\frac{1}{3}\] Partial pressure of \[{{O}_{2}}\] Total pressure \[\times \] mole fraction of \[{{O}_{2}}\], \[{{P}_{{{O}_{2}}}}=P\times \frac{1}{3}=\frac{1}{3}P\]
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