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CGP EDU Academic Team
Published on: August 14, 2026
At 800°C, the following equilibrium is established as F 2 (g) 
2F (g) The composition of equilibrium may be determined by measuring the rate of effusion of the mixture through a pin hole. It is found that 800° C and 1 atm mixture effuses 1 .6 times as fast as SO 2 effuses under the similar conditions. (At. wt. of F = 19). What is the value of K p (in atm) ?
Text Solution
Verified by ExpertsThe correct answer is:
D
1.49
According to Graham's law of effusion
Let mole fraction of F2 is x. Therefore, mole fraction of F will be (1 - x) 
x=0.315;
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